FleXConf: A Flexible Conference Assistant Using Context-Aware Notification Services. - Nikos Armenatzoglou; Yannis Marketakis; Lito Kriara; Elias Apostolopoulos; Vicky Papavasiliou; Dimitris Kampas; Alexandros Kapravelos; Eythimis Kartsonakis; Giorgos Linardakis; Sofia Nikitaki; Antonis Bikakis; Grigoris Antoniou (OTM Workshops, 2009)