Matko Bosnjak, Andrzej A. Kononowicz, Katarzyna Styczkiewicz, Bogumila Bacior, Rajko Horvat, Marin Prcela, Dragan Gamberger, Angela Sciacqua, Mariaconsuelo Valentini, Kalina Kawecka-Jaszcz, Gianfranco Parati, Domenico Conforti. HEARTFAID's eCRF: Lessons Learnt from Using a Two-Level Data Acquisition and Storage System for Knowledge Discovery Tasks within an Electronic Platform for Managing Heart Failure Patients. Bio-Algorithms and Med-Systems, 5(10):59-69, 2009.