@inproceedings{STOC-1969-Zeiger,
	author        = "H. Paul Zeiger",
	booktitle     = "{Proceedings of the First Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800169.805435",
	pages         = "211--215",
	publisher     = "{ACM}",
	title         = "{Formal Models for Some Features of Programming Languages}",
	year          = 1969,
}