1. Comparative renal function in reptiles, birds and mammals;Braun;Semin Avian Exotic Pet Med,1998
2. Harnorgane (Organa urinaria);Carretero,2001
3. Renal and extrarenal regulation of body fluid composition;Goldstein,2000
4. Structure of the kidney;Siller,1983
5. Osmoregulation in birds;Skadhauge,1981