@article{Fischer:1965a,
	key = "Fischer 1965a",
	author = "P. C. Fischer",
	title = "Multi-tape and infinite-state automata--a survey",
	journal = CACM,
	volume = 8,
	year = "{\noopsort{1965a}}1965",
	pages = "799-805"}

@article{Fischer:1965b,
	key = "Fischer 1965b",
	author = "P. C. Fischer",
	title = "On formalisms for {Turing} machines",
	journal = JACM,
	volume = 12,
	year = "{\noopsort{1965b}}1965",
	pages = "570-580"}

@incollection{Freivalds:1979,
	key = "Freivalds 1979",
	author = "R. Freivalds",
	title = "Fast probabilistic algorithms",
	booktitle = "Mathematical Foundations of Computer Science 1979",
	editor = "J. {Be\v cv\'a\v r}",
	series = LNICS,
	volume = 74,
	publisher = SV,
	year = 1979,
	pages = "57-69"}