Bibliography
Tan, A.-m., and G.-f. Wu . 1987. Preliminary studies on the karytoypes of three 'spine-frogs' and the karyotypic evolution of the subgenus Paa (Anura: Ranidae, Rana). Acta Herpetologica Sinica/ Liangqi baxing dongwu yanjiu. New Series. Chengdu 6 (4): 35-38. [In Chinese with English abstract]
