1. Advancements in nutrition and nutritional therapy
2. Sedgwick C.(1991).Allometrically scaling the data base for vital sign assessment used in general anesthesia of zoological species.American Association of Zoo Veterinarians Calgary Canada 1991 p.360–369.
3. Energy and protein nutrition of companion birds;Sales J.;Vlaams Diergeneeskindig Tijdschr,2003
4. Field metabolic rate and body size;Nagy K.A.;J. Exp. Biol.,2005