Tapiero, Yesid, Bernabe L Rivas, and Julio Sanchez. 2019. “ACTIVATED POLYPROPYLENE MEMBRANES WITH ION-EXCHANGE POLYMERS TO TRANSPORT CHROMIUM IONS IN WATER”. Journal of the Chilean Chemical Society 64 (4), 4597-4606. https://www.jcchems.com/index.php/JCCHEMS/article/view/1333.