IMRAN, M.; SHAHZAD, K.; MUNIR, S.; WASIM, M.; HUSSNAIN, A. Synthesis and characterization of potassium silicate fertilizer using fly ashes of bituminous and sub-bituminous and lignite coal. Journal of the Pakistan Institute of Chemical Engineers, [S. l.], v. 48, n. 2, p. 47–54, 2021. DOI: 10.54693/piche.04826. Disponível em: http://piche.org.pk/journal/index.php/jpiche/article/view/475. Acesso em: 23 apr. 2024.