Mahmoud, A. M. ., E. E. . Hamouda, R. M. . ElBakrey, and A. A. . Eid. “Reviewing the Efficiency of Field and Experimentally Utilized Vaccine Regimens Against Infectious Bronchitis Virus in Egypt (2000-2021)”. Journal of Advanced Veterinary Research, vol. 13, no. 10, Jan. 2024, pp. 2202-9, https://advetresearch.com/index.php/AVR/article/view/1592.