A. A. Adekunle, I. U. Tobit, и O. O. Gbemiga, „Effect of Ammonium on the Hydraulic Conductivity of Kaolin and Bentonite as Clay Liners: Effect of Ammonium on the Hydraulic Conductivity of Kaolin and Bentonite as Clay Liners“, ГТУВ, том 4, бр. 2, стр. 100–111, Дек 2020.