@inproceedings{FPCA-1993-Lillie,
	author        = "David J. Lillie",
	booktitle     = "{Proceedings of the Sixth Conference on Functional Programming Languages and Computer Architecture}",
	isbn          = "0-89791-595-X",
	pages         = "42--51",
	publisher     = "{ACM Press}",
	title         = "{Conjunctive Subtyping}",
	year          = 1993,
}