Jonathan R. Dungca, and Joenel G. Galupino. “ARTIFICIAL NEURAL NETWORK PERMEABILITY MODELING OF SOIL BLENDED WITH FLY ASH”. GEOMATE Journal 12, no. 31 (December 3, 2016): 77–82. Accessed June 29, 2022. https://geomatejournal.com/geomate/article/view/1085.