Media type: E-Article Title: Lecture Notes in Computer Science: Workshop on Information Retrieval over Social Networks Contributor: Marchand-Maillet, Stephane; de Vries, Arjen P.; Naaman, Mor imprint: Springer Berlin Heidelberg, 2009 Published in: Lecture Notes in Computer Science Language: Not determined DOI: 10.1007/978-3-642-00958-7_90 ISSN: 0302-9743; 1611-3349 Origination: Footnote: