S. Musa, F. Denan, R. Hamdan, and R. M. S. Radin Mohamed. “Natural Groundwater Eco-Treatment (N-GET) for Water Supply at Johor, Malaysia”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, vol. 9, no. 1, May 2015, pp. 19-27, https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/2547.