@Incollection{ls_leimeister,
  author = {Hoffmann, Axel and Bittner, Eva Alice Christiane and Leimeister, Jan Marco},
  title  = {The Emergence of Mutual and Shared Understanding in the System Development Process},

  year   = {2013},
  number = {7830},
  url    = {http://pubs.wi-kassel.de/wp-content/uploads/2013/04/JML_410.pdf},

  const  = {\ text}
}
@Inproceedings{wegener2012creation,
  author = {Wegener, R. and Leimeister, J. M.},
  title  = {Peer Creation of E-Learning Materials to Enhance Learning Success and Satisfaction in an Information Systems Course},

  year   = {2012},
  number = {},
  url    = {http://pubs.wi-kassel.de/wp-content/uploads/2013/03/JML_324.pdf},

  const  = {\ text}
}