@article {IOPORT.05750053,
    author       = {Hogg, Tad and Lerman, Kristina},
    title        = {Stochastic models of user-contributory web sites.},
    year         = {2009},
    journal      = {Computing Research Repository (CoRR)},
    volume       = {2009},
    pages        = {Article No. 0904.0016},
    publisher    = {Association for Computing Machinery, New York, NY; Cornell University, Ithaka, NY},
    identifier   = {05750053},
}