1. Ahmad, M. S., Charkhi, W., & Stanikzai, M. J. (2023). Preliminary evaluation of the current generation, breeding, and preliminary milk of dairy cows in Baghlan province, Afghanistan. Academic research in educational sciences, 4(6), 153-163. https://cyberleninka.ru/article/n/preliminary-evaluation-of-the-current-generation-breeding-and-milk-preliminary-of-dairy-cows-in-baghlan-province-afghanistan
2. AOAC (Association of Official Analytical Chemists). (2000). Official Methods of Analysis International, 17th Ed. AOAC, Washington, DC. https://www.scirp.org/reference/ReferencesPapers?ReferenceID=1687699
3. AOAC (Association of Official Analytical Chemists). (2005). “Official methods of analysis.” The association of official analytical chemists. 18th edition. 481. North Fredrick Avenue Gaithersburg, Maryland, USA. https://www.scirp.org/reference/ReferencesPapers?ReferenceID=1763751
4. COSMT. (2001). Milk – Determination of fat content (Routine method) [in Czech: Mléko - Stanovení obsahu tuku (Rutinní metoda)]. CSN ISO 2446:2001. Prague: Czech Office for Standards, Metrology and Testing. https://www.technicke-normy-csn.cz/csn-iso-2446-570543-210393.html#
5. Bansal, S., & Bansal, R. C. (2015). Dairy: Processing & quality assurance. In Dairy Production and Processing: The Science of Milk and Milk Products (pp. 389-405). John Wiley & Sons. https://doi.org/10.1002/9781118810279.ch01