1. The digestive system;Reeder,1964
2. Food and feeding;Duellman,1994
3. Zur morphologie der zahne rezenter amphibien;Oltmanns;Anat Anz,1952
4. The alimentary tract and its appendages together with the spleen and mesenteries;Francis,1934
5. Structural and functional characteristics of living amphibians;Porter,1972