@inproceedings{FDG-2010-MilamE,
	author        = "David Milam and Magy Seif El-Nasr",
	booktitle     = "{Proceedings of the Fifth International Conference on the Foundations of Digital Games}",
	doi           = "10.1145/1822348.1822367",
	isbn          = "978-1-60558-937-4",
	pages         = "139--146",
	publisher     = "{ACM}",
	title         = "{Analysis of level design 'push & pull' within 21 games}",
	year          = 2010,
}