Fatibello-Filho, O., & Vieira, H. J. (2009). Spectrophotometric flow injection system for determination of Zn2+ in ophthalmic formulations using Alizarin red S. Eclética Química, 34(2), 67–72. https://doi.org/10.26850/1678-4618eqj.v34.2.2009.p67-72