@article {24903,
	title = {Proceedings of the Annual Hawaii International Conference on System Sciences},
	journal = {Design strategies for gamified physical activity applications for older adults},
	year = {2016},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84975487647\&partnerID=MN8TOARS},
	author = {Kappen, D.L. and Nacke, L.E. and Gerling, K.M. and Tsotsos, L.E.}
}
