@book {2453,
	title = {The Tree of Knowledge: Biological Roots of Human Understanding},
	year = {1986},
	publisher = {Shambala},
	organization = {Shambala},
	address = {London},
	author = {Maturana, Humberto R. and Varela, Francisco J.}
}
@inbook {2456,
	title = {Describing the Logic of the Living. The Adequacy and Limitations of the Idea of Autopoiesis},
	booktitle = {Autopoiesis. A Theory of Living Organization},
	year = {1981},
	publisher = {North Holland},
	organization = {North Holland},
	address = {New York},
	author = {Varela, Francisco J.},
	editor = {Zeleny, Milan}
}
@inbook {2455,
	title = {Autopoiesis. The Organization of the Living (1972)},
	booktitle = {Autopoiesis and Cognition. The Realization of the Living},
	year = {1980},
	publisher = {Reidel},
	organization = {Reidel},
	address = {Dordrecht},
	author = {Maturana, Humberto R. and Varela, Francisco J.}
}
@inbook {2454,
	title = {Biology of Cognition (1970)},
	booktitle = {Autopoiesis and Cognition. The Realization of the Living},
	year = {1980},
	publisher = {Reidel},
	organization = {Reidel},
	address = {Dordrecht},
	author = {Maturana, Humberto R. and Varela, Francisco J.}
}
