@conference {819, title = {Community-centric analysis of user engagement in Skype social network}, booktitle = {International conference on Advances in Social Network Analysis and Mining}, year = {2015}, publisher = {IEEE}, organization = {IEEE}, address = {Paris, France}, isbn = {978-1-4503-3854-7}, doi = {10.1145/2808797.2809384}, url = {http://dl.acm.org/citation.cfm?doid=2808797.2809384}, author = {Giulio Rossetti and Luca Pappalardo and Riivo Kikas and Dino Pedreschi and Fosca Giannotti and Marlon Dumas} }