1. Arvy, L. &Hadjiisky, P. (1970). Histoenzymologie des activitiés deshydrogénasique dans l'ovaire deCoturnix coturnix L. et deGallus gallus L. (Phasianides, Galliformes)C.r. Ass. Anat. 34, 50?62.
2. Baillie, A. H., Ferguson, M. M. &Hart, D. MCK. (1966). ?Developments in steroid histochemistry?, New York: Academic Press.
3. Benoit, J. (1950). Reproduction caracteres sexuals et hormones d'eterminison du cycle saisonnier. In:Traite du Zoologie (ed. P-P. Grasse). Vol. 15. pp. 384?478. Paris: Masson.
4. Bhujle, B. V. & Nadkarni, V. B. (1977). Steroid synthesizing cellular sites in the developing gonads of the domestic pigeon,Columba livia. Proc. 1st Int. Symp. Avian Endocrinol., Calcutta, Jan. 1977. Abstr. 77.
5. Botte, V., Delrio, G. & Lupo D'prisco, C. (1966). Conversion of neutral steroid hormonesin vitro by the theca cells of the growing ova of the laying hen.Exerpta Med. Found. Int. Congr. III, Abstr. 738.