HENDRI, Yola Bertilsya et al. Synergistic effects of low-cost graphene and coal fly ash on the strength–porosity performance of cellular lightweight concrete. SINERGI, Jakarta, Indonesia, v. 30, n. 3, p. 1023–1036, 2026. DOI: 10.22441/sinergi.2026.3.025. Disponível em: https://publikasi.mercubuana.ac.id/index.php/sinergi/article/view/36338. Acesso em: 9 oct. 2026.