Masoud Valafar, Reza Rejaie, Walter Willinger. Beyond friendship graphs: a study of user interactions in Flickr. In Jon Crowcroft, Balachander Krishnamurthy, editors, Proceedings of the 2nd ACM Workshop on Online Social Networks, WOSN 2009, Barcelona, Spain, August 17, 2009. pages 25-30, ACM, 2009. [doi]
Abstract is missing.