@inproceedings{POPL-2004-DunfieldP,
	author        = "Joshua Dunfield and Frank Pfenning",
	booktitle     = "{Proceedings of the 31st Symposium on Principles of Programming Languages}",
	doi           = "10.1145/964001.964025",
	editor        = "Neil D. Jones and Xavier Leroy",
	isbn          = "1-58113-729-X",
	pages         = "281--292",
	publisher     = "{ACM}",
	title         = "{Tridirectional typechecking}",
	year          = 2004,
}