1. Biological Systematics: Principles and Applications;Schuh,2009
2. Animal Biology;Grove,1942
3. The Life of Vertebrates;Young,1950
4. The Phenomenology of Mindhttps://www.google.com.hk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwi8uZrD7cXXAhVQoqQKHTDPChAQFgg2MAE&url=http%3A%2F%2Fwww.naturalthinker.net%2Ftrl%2Ftexts%2FHegel%2CG.W.F%2FHegel%2C_G.W.F._-_The_Phenomenology_Of_Mind.pdf&usg=AOvVaw2K6iWaTZAdWQO6CY1MwPS7
5. Phylogenetic Systematics;Hennig,1966