Kenzhalievich, Kenzhaliyev Bagdaulet, et al. “Modified Sorbents Based on Natural Mineral and Its Mechanical Properties”. Jurnal Pendidikan Teknologi Kejuruan, vol. 7, no. 4, Nov. 2024, pp. 238-44, https://doi.org/10.24036/jptk.v7i4.39123.