Pattee, Howard H. 1972. Laws and constraints, symbols and languages. In: Waddington, Conrad H. (ed.), Towards a Theoretical Biology 4: Essays. Edinburgh: Edinburgh University Press, 248-258.
Pattee, Howard H. 1973. Hierarchy Theory; The Challenge of Complex Systems. (International Library of Systems Theory and Philosophy.) New York: Georges Braziller.
Pattee, Howard H. 1992. The measurement problem in physics, computation, and brain theories. In: Carvallo, M. E. (ed.), Nature. Cognition and System II. Kluwer Academic Publishers, 179-192.
Pattee, Howard H. 2001. The physics of symbols: Bridging the epistemic cut. Biosystems 60: 5–21.
Pattee, Howard H. 2007. The necessity of biosemiotics: Matter–symbol complementarity. In: Barbieri, M. (ed.), Introduction to Biosemiotics. Berlin: Springer, 115–132.
Umerez, Jon 2001. Howard Pattee's theoretical biology: a radical epistemological stance to approach life, evolution and complexity. Biosystems 60: 159-177.