@article{Lupoetal, author = {Lupo, C. and et al.,}, title = {Steroid hormones and reproductive history of the grey partridge Perdip perdip}, series = {Boll. Zool., Vol. 57 (1990), pp. 247-252.}, journal = {Boll. Zool., Vol. 57 (1990), pp. 247-252.}, language = {en} } @article{Farabollinietal, author = {Farabollini, F. and et al.,}, title = {Time-course of Opioid and Pituitary-Adrenal Hormone Modifications During the Immobility Reaction in Rabbits}, series = {Physiology and Behavior, Vol. 47 (1990), pp. 337-341.}, journal = {Physiology and Behavior, Vol. 47 (1990), pp. 337-341.}, language = {en} }