@inproceedings{STOC-1969-RosenkrantzS,
	author        = "Daniel J. Rosenkrantz and Richard Edwin Stearns",
	booktitle     = "{Proceedings of the First Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800169.805431",
	pages         = "165--180",
	publisher     = "{ACM}",
	title         = "{Properties of Deterministic Top Down Grammars}",
	year          = 1969,
}