1. Liboff, R.L.: Introductory Quantum Mechanics. Addison Wesley Longman, Boston (2002)
2. Cronan, C.S.: Introduction to Ecology & Ecosystems Analysis. Shaw-Ferguson Environmental Publications, Orono (1996)
3. Berto, F.: There’s Something about Gödel: The Complete Guide to the Incompleteness Theorem. John Wiley and Sons, Hoboken (2010)
4. Rosen, R.: Life Itself. Columbia University Press, New York (1991)
5. Hardie, R.P., Gaye, R.K.: Aristotle: Physics, http://etext.library.adelaide.edu.au/a/aristotle/physics/