@inproceedings{STOC-1969-BookG,
	author        = "Ronald V. Book and Sheila A. Greibach",
	booktitle     = "{Proceedings of the First Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800169.805416",
	pages         = "15--18",
	publisher     = "{ACM}",
	title         = "{Quasi-Realtime Languages}",
	year          = 1969,
}