Yati, K., Srifiana, Y. and Putra, F. 2017. EFFECT OF OPTIMIZATION OF TWEEN 80 AND PROPYLENE GLYCOL AS A SURFACTANT AND COSURFACTANT ON THE PHYSICAL PROPERTIES OF ASPIRIN MICROEMULSION. International Journal of Applied Pharmaceutics. 9, (Oct. 2017), 127–129. DOI:https://doi.org/10.22159/ijap.2017.v9s1.71_78.