T. Rist, A. Seiderer, S. Hammer, M. Mayr, A. et al., CARE: Extending a Digital Picture Frame with a Recommender Mode to Enhance Well-being of Elderly People, Pervasive Health, 2015.

. Rowan and E. D. Mynatt, Digital family portrait field trial: Supportfor aging in place, Proc. of CHI '05, pp.521-530, 2005.

J. Lumsden, E. A. Edwards, N. S. Lawrence, D. Coyle, and M. R. Munò, Gamification of cognitive assessment and cognitive training: a systematic review of applications and efficacy, JMIR Serious Games, vol.4, 2016.

D. Johnson, S. Deterding, K. Kuhn, A. Staneva, S. Stoyanov et al., Gamification for health and wellbeing: A systematic review of the literature, Internet Interventions, vol.6, pp.89-106, 2016.

D. Schutter, B. Vanden-abeele, and V. , Designing Meaningful Play within the Psycho-social Context of Older Adults, Fun and Games '10, pp.84-93