1. Ahe, K., & Perez de Francisco, C. Genetic aspects of psychophysiological variables. Neurologia, Neurocirugia, Psiquitria, 1974, 15, 5–18.
2. Barnicot, N. A. Taste deficiency for phenylthiourea in African Negroes and Chinese. Annals of Eugenics, 1950, 15, 248–254.
3. Barrows, S. L. The inheritance of the ability to taste brucine. M.A. Thesis, Stanford University, 1945.
4. Berrien, F. K. General and social systems. New Brunswick, N.J.: Rutgers University Press, 1968.
5. von Bertalanffy, L. General systems theory. Main Currents in Modern Thought, 1955, 11, 75–83.