B. Guner, M. Erturk, B. Ozturk, A. Ayalp-Erkan, M. Dursun, and B. Aydogan, “Effect of oestrus expression and eCG treatment on reproductive performance in dairy cows subjected to Progesterone plus Ovsynch protocol”, Rev. Cient. FCV-LUZ, vol. 36, no. 1, p. 9, Feb. 2026.