Rop, N.K., E.K Kiprop, and J. O. Ochuodho. “Occurrence of Black Spot Disease of Brassicas Caused by Alternaria Species in Kenya”. East African Journal of Pure and Applied Sciences 2, no. 1 (October 1, 2012): Pg 6–15. Accessed April 13, 2024. http://ojs.uoeld.ac.ke/index.php/eapas/article/view/226.