Ravikumar, Y., B. Ashok Kumar Reddy, M. Lakshmi Namratha, G. Ramesh, B. Mahesh, and M. Lakshman. 2019. “Lymphoid Leucosis and Marek’s Disease in Chicken – Gross and Histopathological Studies”. International Journal of Livestock Research 9 (8). India:140-44. https://ijlr.org/ojs_journal/index.php/ijlr/article/view/1150.