@inproceedings{CFLP-1987-TannenC,
	author        = "Val Tannen and Thierry Coquand",
	booktitle     = "{Proceedings of the Second International Joint Conference on Theory and Practice of Software Development, Volume 2: Colloquium on Functional and Logic Programming and Specifications}",
	doi           = "10.1007/BFb0014987",
	isbn          = "3-540-17611-X",
	pages         = "291--307",
	publisher     = "{Springer}",
	title         = "{Extensional Models for Polymorphism}",
	year          = 1987,
}