Robert, Ubong Williams, Sunday Edet Etuk, Okechukwu Ebuka Agbasi, Grace Peter Umoren, Samuel Sunday Akpan, and Lebe Agwu Nnanna. “Hydrothermally-Calcined Waste Paper Ash Nanomaterial As an Alternative to Cement for Clay Soil Modification for Building Purposes”. Acta Polytechnica 61, no. 6 (December 31, 2021): 749–761. Accessed May 6, 2024. https://ojs.cvut.cz/ojs/index.php/ap/article/view/7289.