- bibliography on the philosophy of computer science
- Wikipedia article about the Concept-oriented data model
- Cambridge University Press, (1969)
- Harvard University Press, Cambridge, (1962)
- Bloomington, (1979)
- Universidad Politécnica de Valencia, M.S. Thesis, (2008)
- Bayot, Paris, (1916)
- (1931)
- The Stanford Encyclopedia of Philosophy, Summer 2011 edition, (June 2011)
- Communication Theory 9(2):119--161 (1999)
- Minuit, Paris, (1963)
- Mouton, (1956)
- Nature (1878)
- Philosophical Magazine (1857)
- Hermann, Paris, (1970)
- ASE, page 295-298. (1999)
- (2007)
- Cambridge University Press, 2nd edition, (2010)
- Transactions of the American Institute of Electrical Engineers (1938)
- Walton and Maberly, London, (1854)
- Macmillan, Barclay, \& Macmillan, Cambridge, (1847)
- Lecture slides, (1998)


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