Mahmoud, Manal A.M., Hosnia S. Abdel-Mohsein, and Usama T. Mahmoud. 2014. “Effect of Chinese Propolis Supplementation on Ross Broiler Chicks: Microbial Population in Fecal Matter and Litter”. Journal of Advanced Veterinary Research 4 (2):77-84. https://www.advetresearch.com/index.php/AVR/article/view/76.