@inproceedings{LICS-2001-Jeffrey,
	author        = "Alan Jeffrey",
	booktitle     = "{Proceedings of the 16th Annual IEEE Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.2001.932508",
	isbn          = "0-7695-1281-X",
	pages         = "323--333",
	publisher     = "{IEEE Computer Society}",
	title         = "{A Symbolic Labelled Transition System for Coinductive Subtyping of Fμ≤ Types}",
	year          = 2001,
}