@article{article3bc6b665,
title   = {The effects of pH and ionic strength on topical delivery of a negatively charged porphyrin},
author = {Gelfuso, Guilherme Martins and Figueiredo, Fábio Vasconcelos and Gratieri, Taís and Lopez, Renata Fonseca Vianna},
year = {2008},
journal   = {Journal of Pharmaceutical Sciences}
}