@Article{atzmueller2014ubicon,
  author = {Atzmueller, Martin and Becker, Martin and Kibanov, Mark and Scholz, Christoph and Doerfel, Stephan and Hotho, Andreas and Macek, Bjoern-Elmar and Mitzlaff, Folke and Mueller, Juergen and Stumme, Gerd},
  title  = {Ubicon and its applications for ubiquitous social computing},
  journal = {New Review of Hypermedia and Multimedia},
  year   = {2014},
  number = {1},
  url    = {http://www.tandfonline.com/doi/abs/10.1080/13614568.2013.873488},
  doi = {10.1080/13614568.2013.873488},
  const  = {\ text}
}
@Other{beel2013research,
  author = {Beel, Joeran and Langer, Stefan and Genzmehr, Marcel and Gipp, Bela and Breitinger, Corinna and Nürnberger, Andreas},
  title  = {Research Paper Recommender System Evaluation: A Quantitative Literature Survey},

  year   = {2013},
  number = {},
  url    = {},

  const  = {\ text}
}
@Article{adomavicius2012impact,
  author = {Adomavicius, Gediminas and Zhang, Jingjing},
  title  = {Impact of Data Characteristics on Recommender Systems Performance},
  journal = {ACM Trans. Manage. Inf. Syst.},
  year   = {2012},
  number = {1},
  url    = {http://doi.acm.org/10.1145/2151163.2151166},
  doi = {10.1145/2151163.2151166},
  const  = {\ text}
}
@Article{gemmell2012resource,
  author = {Gemmell, Jonathan and Schimoler, Thomas and Mobasher, Bamshad and Burke, Robin},
  title  = {Resource recommendation in social annotation systems: A linear-weighted hybrid approach},
  journal = {Journal of Computer and System Sciences},
  year   = {2012},
  number = {4},
  url    = {http://www.sciencedirect.com/science/article/pii/S0022000011001127},
  doi = {10.1016/j.jcss.2011.10.006},
  const  = {\ text}
}
@Article{konstan2012recommender,
  author = {Konstan, JosephA. and Riedl, John},
  title  = {Recommender systems: from algorithms to user experience},
  journal = {User Modeling and User-Adapted Interaction},
  year   = {2012},
  number = {1-2},
  url    = {http://dx.doi.org/10.1007/s11257-011-9112-x},
  doi = {10.1007/s11257-011-9112-x},
  const  = {\ text}
}
@Other{noauthororeditor,
  author = {leaong, Sheryl},
  title  = {A survey of recommender systems for scientific papers},

  year   = {2012},
  number = {},
  url    = {},

  const  = {\ text}
}
@Book{owen2012mahout,
  author = {Owen, Sean},
  title  = {Mahout in action},

  year   = {2012},
  number = {},
  url    = {http://www.amazon.de/Mahout-Action-Sean-Owen/dp/1935182684},

  const  = {\ text}
}
@Inproceedings{heck2011testing,
  author = {Heck, Tamara and Peters, Isabella and Stock, Wolfgang G.},
  title  = {Testing collaborative filtering against co-citation analysis and bibliographic coupling for academic author recommendation},

  year   = {2011},
  number = {},
  url    = {},

  const  = {\ text}
}
@Book{jannach2011recommender,
  author = {Jannach, Dietmar},
  title  = {Recommender systems : an introduction},

  year   = {2011},
  number = {},
  url    = {http://www.amazon.de/Recommender-Systems-Introduction-Dietmar-Jannach/dp/0521493366/ref=sr_1_1?ie=UTF8&qid=1356099943&sr=8-1},

  const  = {\ text}
}
@Inproceedings{kim2011personalized,
  author = {Kim, Heung-Nam and El Saddik, Abdulmotaleb},
  title  = {Personalized PageRank vectors for tag recommendations: inside FolkRank},

  year   = {2011},
  number = {},
  url    = {http://doi.acm.org/10.1145/2043932.2043945},
  doi = {10.1145/2043932.2043945},
  const  = {\ text}
}
@Incollection{kubatz2011localrank,
  author = {Kubatz, Marius and Gedikli, Fatih and Jannach, Dietmar},
  title  = {LocalRank - Neighborhood-Based, Fast Computation of Tag Recommendations},

  year   = {2011},
  number = {},
  url    = {http://dx.doi.org/10.1007/978-3-642-23014-1_22},
  doi = {10.1007/978-3-642-23014-1_22},
  const  = {\ text}
}
@Article{montas2011tagranker,
  author = {Montañés, Elena and Ramón Quevedo, José and Díaz, Irene and Cortina, Raquel and Alonso, Pedro and Ranilla, José},
  title  = {TagRanker: learning to recommend ranked tags},
  journal = {Logic Journal of IGPL},
  year   = {2011},
  number = {2},
  url    = {http://jigpal.oxfordjournals.org/content/19/2/395.abstract},
  doi = {10.1093/jigpal/jzq036},
  const  = {\ text}
}
@Book{pariser2011filter,
  author = {Pariser, Eli},
  title  = {The filter bubble : what the Internet is hiding from you},

  year   = {2011},
  number = {},
  url    = {http://www.amazon.de/The-Filter-Bubble-Internet-Hiding/dp/1594203008/ref=sr_1_2?ie=UTF8&qid=1371456042&sr=8-2&keywords=filter+bubble},

  const  = {\ text}
}
@Article{shani2011evaluating,
  author = {Shani, G. and Gunawardana, A.},
  title  = {Evaluating recommendation systems},
  journal = {Recommender Systems Handbook},
  year   = {2011},
  number = {},
  url    = {http://scholar.google.de/scholar.bib?q=info:AW2lmZl44hMJ:scholar.google.com/&output=citation&hl=de&as_sdt=0,5&ct=citation&cd=0},

  const  = {\ text}
}
@Inproceedings{cremonesi2010performance,
  author = {Cremonesi, Paolo and Koren, Yehuda and Turrin, Roberto},
  title  = {Performance of Recommender Algorithms on Top-n Recommendation Tasks},

  year   = {2010},
  number = {},
  url    = {http://doi.acm.org/10.1145/1864708.1864721},
  doi = {10.1145/1864708.1864721},
  const  = {\ text}
}
@Article{gedikli2010rating,
  author = {Gedikli, Fatih and Jannach, Dietmar},
  title  = {Rating items by rating tags},
  journal = {Systems and the Social Web at ACM },
  year   = {2010},
  number = {},
  url    = {},

  const  = {\ text}
}
@Electronic{priem2010scientometrics,
  author = {Priem, Jason and Hemminger, Bradely H.},
  title  = {Scientometrics 2.0: New metrics of scholarly impact on the social Web},
  journal = {First Monday; Volume 15, Number 7 - 5 July 2010},
  year   = {2010},
  number = {},
  url    = {http://www.uic.edu/htbin/cgiwrap/bin/ojs/index.php/fm/article/view/2874/2570},

  const  = {\ text}
}
@Inproceedings{rendle2010pairwise,
  author = {Rendle, Steffen and Schmidt-Thieme, Lars},
  title  = {Pairwise interaction tensor factorization for personalized tag recommendation},

  year   = {2010},
  number = {},
  url    = {http://doi.acm.org/10.1145/1718487.1718498},
  doi = {10.1145/1718487.1718498},
  const  = {\ text}
}
@Phdthesis{bogers2009recommender,
  author = {Bogers, Toine},
  title  = {Recommender Systems for Social Bookmarking},

  year   = {2009},
  number = {},
  url    = {http://ilk.uvt.nl/~toine/phd-thesis/},

  const  = {\ text}
}
@Inproceedings{jaeschke2009testing,
  author = {Jäschke, Robert and Eisterlehner, Folke and Hotho, Andreas and Stumme, Gerd},
  title  = {Testing and Evaluating Tag Recommenders in a Live System},

  year   = {2009},
  number = {},
  url    = {},

  const  = {\ text}
}
@Article{landia2009personalised,
  author = {Landia, N. and Anand, S.S.},
  title  = {Personalised Tag Recommendation},
  journal = {Recommender Systems \& the Social Web},
  year   = {2009},
  number = {},
  url    = {http://scholar.google.de/scholar.bib?q=info:GhmAwnjPyP0J:scholar.google.com/&output=citation&hl=de&as_sdt=2000&ct=citation&cd=0},

  const  = {\ text}
}
@Inproceedings{marinho:ecml2009,
  author = {Rendle, Steffen and Schmidt-Thieme, Lars},
  title  = {Factor Models for Tag Recommendation in BibSonomy},

  year   = {2009},
  number = {},
  url    = {http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-497/},

  const  = {\ text}
}
@Inproceedings{hotho2006trend,
  author = {Hotho, Andreas and J\"{a}schke, Robert and Schmitz, Christoph and Stumme, Gerd},
  title  = {Trend detection in folksonomies},

  year   = {2006},
  number = {},
  url    = {http://dx.doi.org/10.1007/11930334_5},
  doi = {10.1007/11930334_5},
  const  = {\ text}
}
@Inproceedings{McNee:2006:AEA:1125451.1125659,
  author = {McNee, Sean M. and Riedl, John and Konstan, Joseph A.},
  title  = {Being accurate is not enough: how accuracy metrics have hurt recommender systems},

  year   = {2006},
  number = {},
  url    = {http://doi.acm.org/10.1145/1125451.1125659},
  doi = {10.1145/1125451.1125659},
  const  = {\ text}
}
@Inproceedings{McNee:2006:DLS:1180875.1180903,
  author = {McNee, Sean M. and Kapoor, Nishikant and Konstan, Joseph A.},
  title  = {Don't look stupid: avoiding pitfalls when recommending research papers},

  year   = {2006},
  number = {},
  url    = {http://doi.acm.org/10.1145/1180875.1180903},
  doi = {10.1145/1180875.1180903},
  const  = {\ text}
}
@Phdthesis{mcnee2006meeting,
  author = {Mcnee, Sean Michael},
  title  = {Meeting User Information Needs in Recommender Systems},

  year   = {2006},
  number = {},
  url    = {},

  const  = {\ text}
}
@Article{10.1109/TKDE.2005.99,
  author = {Adomavicius, Gediminas and Tuzhilin, Alexander},
  title  = {Toward the Next Generation of Recommender Systems: A Survey of the State-of-the-Art and Possible Extensions},
  journal = {IEEE Transactions on Knowledge and Data Engineering},
  year   = {2005},
  number = {6},
  url    = {},
  doi = {http://doi.ieeecomputersociety.org/10.1109/TKDE.2005.99},
  const  = {\ text}
}
@Article{Herlocker:2004:ECF:963770.963772,
  author = {Herlocker, Jonathan L. and Konstan, Joseph A. and Terveen, Loren G. and Riedl, John T.},
  title  = {Evaluating collaborative filtering recommender systems},
  journal = {ACM Trans. Inf. Syst.},
  year   = {2004},
  number = {},
  url    = {http://doi.acm.org/10.1145/963770.963772},
  doi = {10.1145/963770.963772},
  const  = {\ text}
}
@Inproceedings{schein2002methods,
  author = {Schein, Andrew I. and Popescul, Alexandrin and Ungar, Lyle H. and Pennock, David M.},
  title  = {Methods and Metrics for Cold-start Recommendations},

  year   = {2002},
  number = {},
  url    = {http://doi.acm.org/10.1145/564376.564421},
  doi = {10.1145/564376.564421},
  const  = {\ text}
}