@inproceedings{<a href="http://dblp.uni-trier.de/db/about/bibtex.html">DBLP</a>:conf/sigmod/FraternaliMT12,
  author    = {Piero Fraternali and
               Davide Martinenghi and
               Marco Tagliasacchi},
  title     = {Top-k bounded diversification},
  booktitle = {SIGMOD Conference},
  year      = {2012},
  pages     = {421-432},
  ee        = {http://doi.acm.org/10.1145/2213836.2213884},
  crossref  = {DBLP:conf/sigmod/2012},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{<a href="http://dblp.uni-trier.de/db/about/bibtex.html">DBLP</a>:conf/sigmod/2012,
  editor    = {K. Sel\c{c}uk Candan and
               Yi Chen and
               Richard T. Snodgrass and
               Luis Gravano and
               Ariel Fuxman},
  title     = {Proceedings of the ACM SIGMOD International Conference on
               Management of Data, SIGMOD 2012, Scottsdale, AZ, USA, May
               20-24, 2012},
  booktitle = {SIGMOD Conference},
  publisher = {ACM},
  year      = {2012},
  isbn      = {978-1-4503-1247-9},
  ee        = {http://dl.acm.org/citation.cfm?id=2213836},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}