1. Anderson, M. (1990). Biology and semiotics. In: Koch, W. A. (Ed.) Semiotics in the Individual Sciences. Bochum: Universitätsverlag Dr. N. Brockmeyer, pp. 254–281.
2. Anderson, M., Deely, J., Krampen, M., Ransdell, J., Sebeok, T.A., von Uexküll, T. 1984. A semiotic perspective on the sciences: steps toward a new paradigm. Semiotica 52-1/2, 7-47.
3. Aristotle. De Anima. (330 BC/1941) Translator: J. A. Smith. In McKeon, Richard. The Basic Works of Aristotle. New York: Basic Books, pp. 533–603.
4. Aristotle. De Interpretatione. (330 BC/1941) Translator: E. M. Edghill. In McKeon, Richard (1941). The Basic Works of Aristotle. New York: Basic Books, pp. 38–61.
5. Aristotle. De Sensu et Sensibilius. (c350/2004). Translator: J.I. Beare. Available online as e-book at: http://etext.library. adelaide.edu. au/a/aristotle /sense /