@misc {IOPORT.70721771,
    author       = {Negoescu, Radu Andrei and Gatica-Perez, Daniel},
    title        = {Analyzing flickr groups},
    howpublished = {CIVR, 417-426 (2008).},
    year         = {2008},
    doi          = {10.1145/1386352.1386406},
    identifier   = {70721771},
}