@inproceedings{LICS-1989-HarperST,
	author        = "Robert Harper and Donald Sannella and Andrzej Tarlecki",
	booktitle     = "{Proceedings of the Fourth Annual Symposium on Logic in Computer Science}",
	doi           = "10.1109/LICS.1989.39177",
	isbn          = "0-8186-1954-6",
	pages         = "226--237",
	publisher     = "{IEEE Computer Society}",
	title         = "{Structure and Representation in LF}",
	year          = 1989,
}