@inproceedings{ITiCSE-WGR-2004-Williams,
	author        = "Michael R. Williams",
	booktitle     = "{Working Group Reports of the Ninth Conference on Innovation and Technology in Computer Science Education}",
	doi           = "10.1145/1044550.1041630",
	pages         = "12--13",
	publisher     = "{ACM}",
	title         = "{Survey calculations}",
	year          = 2004,
}