PUTRA, R. R. Ideal mortar composition with rice husk ash addition and addictive for maximum mortal strength. INVOTEK: Jurnal Inovasi Vokasional dan Teknologi, [S. l.], v. 21, n. 1, p. 45–68, 2021. DOI: 10.24036/invotek.v21i1.834. Disponível em: http://invotek.ppj.unp.ac.id/index.php/invotek/article/view/834. Acesso em: 24 jul. 2026.