Hadadi, M., A. A. Alamouti, A. Alizadeh, and A. Mohammadi-Sangcheshmeh. “A Two-Step Feeding of Calcium Salts of Fish Oil Improves Reproductive Performance in Holstein Cows”. Spanish Journal of Agricultural Research, Vol. 19, no. 3, Aug. 2021, p. e0607, doi:10.5424/sjar/2021193-17364.