Qathrinnada Ramadhana, Ginta Riady, Hafizuddin Hafizuddin, Cut Nila Thasmi, Erdiansyah Rahmi, and Amalia Sutriana. “Determination of Estrus in Aceh Cows Based on the Van Eerdenburg Method”. Ovozoa: Journal of Animal Reproduction, vol. 11, no. 3, Dec. 2022, pp. 103-8, doi:10.20473/ovz.v11i3.2022.103-108.