@inproceedings{DiGRA-2011-Lange-Nielsen,
	author        = "Filip Lange-Nielsen",
	booktitle     = "{Proceedings of the Sixth DiGRA International Conference: Think, Design, Play}",
	ee            = "http://www.digra.org/digital-library/publications/the-power-up-experience-a-study-of-power-ups-in-games-and-their-effect-on-player-experience/",
	publisher     = "{Digital Games Research Association}",
	title         = "{The Power-up Experience: A study of Power-ups in Games and their Effect on Player Experience}",
	year          = 2011,
}