M. Scalabrin

The Effects of the Duration of the Artificial Photoperiod on the Growth Parameters and Behaviour of Heavy Pigs

G. Martelli, L. Sardi, R. Scipioni, 2005, Veterinary Research Communications.

Globin evolution in some species of the genus Bufo.

L. Guidolin, M. Rasotto, D. Goenarso, 1984, Comparative biochemistry and physiology. B, Comparative biochemistry.