1. Physiological aesthetics;Allen,1877
2. Geschichte der psychologischen Ästhetik;Allesch,1987
3. L’oeuvre de Charles Henry et le problème de la survie;Andry-Bourgois,1931
4. Anon (1886). Distribution of driving power in laboratories, 33, 248–250.
5. Charles Henry and the formation of a psycho-physical aesthetic;Argüelles,1972