A. M. Hassan, M. Nasir, A. Y. Abdullahi, and M. H. Zango, “ POSTPARTUM CONCENTRATIONS OF ESTRADIOL AND PROGESTERONE IN THREE GENOTYPE OF SHEEP FED VARYING LEVELS OF PROTEIN”, FJS, vol. 5, no. 1, pp. 495–501, Jun. 2021, doi: 10.33003/fjs-2021-0501-595.