Astuti, K. W., Sumirtapura, Y. C., & Wiwik S, N. N. (2012). Diffusion of Sodium Diclofenac from Carbopol 940 Gel at Various pH. Journal Pharmaceutical Science and Application, 1(1), 25–32. https://doi.org/10.24843/JPSA.2012.v01.i01.p03