@inproceedings{STOC-1977-ODonnell,
	author        = "Mike O'Donnell",
	booktitle     = "{Proceedings of the Ninth Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800105.803419",
	pages         = "295--305",
	publisher     = "{ACM}",
	title         = "{Subtree Replacement Systems: A Unifying Theory for Recursive Equations, LISP, Lucid and Combinatory Logic}",
	year          = 1977,
}