Kurniawan, S., R. Handarini, and elis dihansih. “GIVING RESPONSE GNRH HORMONE, ESTROGEN, PROGESTERONE AND PROSTAGLANDIN IN ESTRUS SYNCHRONIZATION IMPLEMENTATION ESTROUS COW RECIPIENT FRIESIAN HOLSTEIN”. Jurnal Peternakan Nusantara, vol. 4, no. 2, Jan. 2019, pp. 93-98, doi:10.30997/jpnu.v4i2.1540.