@inproceedings{STOC-1972-Plaisted,
	author        = "David A. Plaisted",
	booktitle     = "{Proceedings of the Fourth Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800152.804895",
	pages         = "44--51",
	publisher     = "{ACM}",
	title         = "{Flowchart Schemata with Counters}",
	year          = 1972,
}