@proceedings{DBLP:conf/ht/2009,
  editor    = {Ciro Cattuto and
               Giancarlo Ruffo and
               Filippo Menczer},
  title     = {HYPERTEXT 2009, Proceedings of the 20th ACM Conference on
               Hypertext and Hypermedia, Torino, Italy, June 29 - July
               1, 2009},
  booktitle = {Hypertext},
  publisher = {ACM},
  year      = {2009},
  isbn      = {978-1-60558-486-7},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}