Savion: an interactive cognitive enhancement software for the elderly. - E. Papastefanakis; Th. Miliotis; I. Perissinaki; A. Kyriklaki; A. Gargeraki; E. Peteinaraki; Panagiotis G. Simos; S. Panagiotakis; K. Maniorou; Alexandros N. Vgontzas (PETRA, 2011)