@inproceedings{FPLE-1995-HartelET,
	author        = "Pieter H. Hartel and Bert van Es and Dick Tromp",
	booktitle     = "{First International Symposium on Functional Programming Languages in Education}",
	doi           = "10.1007/3-540-60675-0_50",
	isbn          = "3-540-60675-0",
	pages         = "269--287",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Basic Proof Skills of Computer Science Students}",
	volume        = 1022,
	year          = 1995,
}