Kemboi, Raymond Kipyegon; Naibei, Isaac Kiprotich; Sirmah, Peter Kipkosgei; Cheruiyot, Peter Kimutai(International Journal of Engineering and Management Research, 2019-08)
Korir, Kipkoech Evans; Sirmah, Peter Kipkosgei; Matonyei, Thomas Kibiwot; Nampushi, James Simiren Ole(East African Journal of Forestry & Agroforestry, 2022)