HOMAGAI, P. L.; POUDEL, S. Effective Removal of Nitrate, Nitrite, Ammonia and Iron from Contaminated Ground Water using Bio-Sand Method and Sponge Layer Filtration Method. Journal of Nepal Chemical Society, [S. l.], v. 39, p. 34–45, 2018. DOI: 10.3126/jncs.v39i0.27019. Disponível em: https://www.nepjol.info/index.php/JNCS/article/view/27019. Acesso em: 23 jun. 2024.