@article{article3afb9867,
title   = {Pretreatment using Opuntia cochenillifera followed by household slow sand filters: technological alternatives for supplying isolated communities},
author = {Freitas, Bárbara Luíza Souza and Sabogal-Paz, Lyda Patricia},
year = {2020},
doi = {10.1080/09593330.2019.1582700},
journal   = {Environmental Technology}
}