@inproceedings{STOC-1969-Cole,
	author        = "Stephen N. Cole",
	booktitle     = "{Proceedings of the First Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800169.805438",
	pages         = "233--245",
	publisher     = "{ACM}",
	title         = "{Pushdown Store Machines and Real-Time Computation}",
	year          = 1969,
}