EL-DIN ZAIN, A., MOUSA, M. (1997). 'SYNCHRONIZATION OF OESTRUS AND FERTILITY IN SHEEP WITH TWO INJECTIONS OF FERTIRELIN ACETATE (GnRH ANALOGUE) AND PROSTAGLANDIN F2 a.', Assiut Veterinary Medical Journal, 36.2(72), pp. 286-296. doi: 10.21608/avmj.1997.183378