@inproceedings{POPL-1973-HechtU,
	author        = "Matthew S. Hecht and Jeffrey D. Ullman",
	booktitle     = "{Conference Record of the First Symposium on Principles of Programming Languages}",
	doi           = "10.1145/512927.512946",
	editor        = "Patrick C. Fischer and Jeffrey D. Ullman",
	pages         = "207--217",
	publisher     = "{ACM Press}",
	title         = "{Analysis of a Simple Algorithm for Global Flow Problems}",
	year          = 1973,
}