Media type: E-Article Title: Lecture Notes in Computer Science: ARES: A Retrieval Engine Based on Sentiments Contributor: Demartini, Gianluca imprint: Springer Berlin Heidelberg, 2011 Published in: Lecture Notes in Computer Science Language: Not determined DOI: 10.1007/978-3-642-20161-5_91 ISSN: 0302-9743; 1611-3349 Origination: Footnote: