SenelwaK., EkakoroE., KirongoB. B., EtiégniL., OroriB., LipwoniV., KatigoJ. K., and MbomaL. M. “Effect of Charcoal Earth Kilns Construction and Firing on Soil Chemical Characteristics”. Jurnal Manajemen Hutan Tropika, Vol. 15, no. 3, 1, pp. 91-95, https://jurnal.ipb.ac.id/index.php/jmht/article/view/3245.