@inproceedings{VS-Games-2012-KiiliFAL,
	author        = "Kristian Kiili and Sara de Freitas and Sylvester Arnab and Timo Lainema",
	booktitle     = "{Proceedings of the Fourth International Conference on Games and Virtual Worlds for Serious Applications}",
	doi           = "10.1016/j.procs.2012.10.060",
	pages         = "78--91",
	publisher     = "{Elsevier}",
	title         = "{The Design Principles for Flow Experience in Educational Games}",
	year          = 2012,
}