@electronic{www.uni-bamberg.de,
   title       = {Otto-Friedrich-Universität Bamberg: IR1-Buch}, 
   url         = {http://www.uni-bamberg.de/minf/IR1-Buch},
   biburl      = {https://puma.uni-kassel.de/url/1078c520daf1c63930b1d28f7027f0e4/hotho},
   keywords    = {buch information ir lecture material retrieval vorlesung},
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@electronic{www-csli.stanford.edu,
   title       = {Introduction to Information Retrieval}, 
   url         = {http://www-csli.stanford.edu/~hinrich/information-retrieval-book.html},
   biburl      = {https://puma.uni-kassel.de/url/c9b7adbe03021d39dce8fafac04d4694/hotho},
   keywords    = {book information introduction ir lecture retrieval slides},
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@electronic{sigir.org,
   title       = {Recommended Reading for IR Research Students}, 
   url         = {http://sigir.org/forum/2005D/2005d_sigirforum_moffat.pdf},
   biburl      = {https://puma.uni-kassel.de/url/392aa26eb25c2c958644f57a2af262fe/hotho},
   keywords    = {lecture retrieval ir infromation survey readings overview},
   added-at    = {2006-02-07T10:09:27.000+0100},
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