Advances in Information Retrieval 40th European Conference on IR Research, ECIR 2018, Grenoble, France, March 26-29, 2018, Proceedings - Pasi, Gabriella; Pasi, Gabriella; Piwowarski, Benjamin; Piwowarski, Benjamin; Azzopardi, Leif; Azzopardi, Leif; Hanbury, Allan; Hanbury, Allan (Springer International Publishing : Imprint: Springer, 2018)