@inproceedings{STOC-1978-Kozen,
	author        = "Dexter Kozen",
	booktitle     = "{Proceedings of the 10th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800133.804358",
	pages         = "287--295",
	publisher     = "{ACM}",
	title         = "{Indexing of Subrecursive Classes}",
	year          = 1978,
}