ROBERT, Ubong Williams; ETUK, Sunday Edet; AGBASI, Okechukwu Ebuka; UMOREN, Grace Peter; AKPAN, Samuel Sunday; NNANNA, Lebe Agwu. Hydrothermally-calcined waste paper ash nanomaterial as an alternative to cement for clay soil modification for building purposes. Acta Polytechnica, Prague, Czech Republic, v. 61, n. 6, p. 749–761, 2021. DOI: 10.14311/AP.2021.61.0749. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/7289. Acesso em: 23 mar. 2025.