A. N., M., B. B. O., K. S. G., and K. O.B. “Enteric Methane Emission of Cattle Grazing Rangeland Ecosystems of South Eastern Kenya”. East African Agricultural and Forestry Journal, Vol. 87, no. 3&4, Nov. 2023, p. 9, https://www.kalro.org/www.eaafj.or.ke/index.php/path/article/view/641.