1. Amanuma, A.: Effect of exstirpation of the presumptive intermediate mesoderm upon the differentiation of the primordial germ cells. Zool. Mag. (Tokyo)66, 310?313 (1957).
2. Asayama, S.: The developmental potencies of the intermediate mesoderm of Triturus pyrrhogaster when transplanted into orthotopic or heterotopic site in the body wall of another embryo. J. Inst. Polytech., Osaka City Univ.1, 13?32 (1950).
3. ?: Potency of lateral plate mesoderm relating to the formation of reproductive tissue. Zool. Mag. (Dobutsugaku Zasshi)70, 7?11 (1961).
4. Chase, S. W.: The mesonephros and urogenital ducts of Necturus maculosus Rafinesque. J. Morph.37, 457?531 (1923).
5. Eisenberger, W.: Die streuenden Geschlechtszellen bei Triturus cristatus. Unveröffentl. (1962).