New Trends in Databases and Information Systems - Catania, Janusz Barbara; Cerquitelli, Tania; Chiusano, Silvia; Guerrini, Giovanna; Kemper, Alfons; Kämpf, Mirko; Novikov, Boris; Palpanas, Themis; Pokorný, Jaroslav; Vakali, Athena (Springer International Publishing, 2014)