B.S.Abulsaidov, U.T.Rakhimov, S.H.Xushvaqtov, R.A.Mamaraimova, and Y.Sh.Abdiqulov, “Milk Productivity of Holstein Cows of Different Genotypes”, Amer.Jour.Bio., vol. 1, no. 6, pp. 27–30, Dec. 2024.