@inproceedings{CHI-PLAY-2015-Kappen,
	author        = "Dennis L. Kappen",
	booktitle     = "{Proceedings of the Second Annual Symposium on Computer-Human Interaction in Play}",
	doi           = "10.1145/2793107.2810276",
	isbn          = "978-1-4503-3466-2",
	pages         = "403--406",
	publisher     = "{ACM}",
	title         = "{Adaptive Engagement of Older Adults' Fitness through Gamification}",
	year          = 2015,
}