@inproceedings{LICS-1992-Tiuryn,
	author        = "Jerzy Tiuryn",
	booktitle     = "{Proceedings of the Seventh Annual Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.1992.185543",
	isbn          = "0-8186-2735-2",
	pages         = "308--315",
	publisher     = "{IEEE Computer Society}",
	title         = "{Subtype Inequalities}",
	year          = 1992,
}