Kamberi, M., and K. Sulaj. “The Evaluation of Oxytetracycline Residues in Cow’s Milk in Tetovo, Macedonia”. ANGLISTICUM. Journal of the Association-Institute for English Language and American Studies, vol. 4, no. 12, Dec. 2016, pp. 23-26, https://www.anglisticum.org.mk/index.php/IJLLIS/article/view/1149.