@inproceedings{LICS-1988-Amadio,
	author        = "Roberto M. Amadio",
	booktitle     = "{Proceedings of the Third Annual Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.1988.5100",
	isbn          = "0-8186-0853-6",
	pages         = "51--60",
	publisher     = "{IEEE Computer Society}",
	title         = "{A fixed point extension of the second order λ-calculus: observable equivalences and models}",
	year          = 1988,
}