HAYATI, R. N.; PANJONO, Panjono; IRAWAN, A. Estrous Signs and Progesterone Profile of Ongole Grade Cows Synchronized at Different Ages Fed Different Level of Dietary Crude Protein. Tropical Animal Science Journal, [S. l.], v. 44, n. 1, p. 16–23, 2021. DOI: 10.5398/tasj.2021.44.1.16. Disponível em: https://journal.ipb.ac.id/tasj/article/view/32183. Acesso em: 31 dec. 2025.