1. Histochemistry and morphology of the secretory granules of skin venom glands of Rana esculenla during the active and hibernating period;Barni;Arch. Biol.,1987
2. Cytochemical demonstration of K+-p-nitro-phenylphosphatase and adenylate cyclase in the skin of Rana esculenta during different seasonal periods;De Piceis Polver,1986
3. Histological observations on the integument of normal and prolactin-treated Rana esculenta L. adult males kept at different temperatures;Guardabassi;Monitore Zool. Ital.,1975
4. Biological clocks and circadian rhythms;Holmes,1975