A. Popescu, M. Pennacchiotti, и D. Paranjpe. Proceedings of the 20th international conference companion on World wide web, стр. 105--106. New York, NY, USA, ACM, (2011)
A. Popescu, и M. Pennacchiotti. Proceedings of the 19th ACM international conference on Information and knowledge management, стр. 1873--1876. New York, NY, USA, ACM, (2010)