A.S. El-Khabaz, Khaled, et al. “Genetic Assessment of Shiga Toxin and Antibiotic Resistance of E. Coli Isolated from Milk of Cows Infected With Sub-Clinical Mastitis”. Journal of Advanced Veterinary Research, vol. 12, no. 3, June 2022, pp. 278-82, https://www.advetresearch.com/index.php/AVR/article/view/981.