@article {Aizawa:2012:0308-0188:206,
	author = "Aizawa, Kenneth",
	title = "Warren McCullochs Turn to Cybernetics: What Walter Pitts Contributed",
	journal = "Interdisciplinary Science Reviews",
	volume = "37",
	number = "3",
	year = "2012",
	abstract = "This paper explores part of the making of a cyberneticist. It examines Walter Pitts' contribution to two of McCulloch's most celebrated publications, `A Logical Calculus of the Ideas Immanent in Nervous Activity' and `How we Know Universals: the Perception of Auditory and Visual Forms'. What we find, in part, is that Pitts provided mathematical clarity and rigor to McCulloch's views on psychons and circular causality.",
	pages = "206-217",
	url = "http://www.ingentaconnect.com/content/maney/isr/2012/00000037/00000003/art00003",
	doi = "doi:10.1179/0308018812Z.00000000017",
	keyword = "circular causality, cybernetics, Warren McCulloch, Walter Pitts, logical calculus, auditory perception, visual perception"
}