Suksaeree, J., C. Monton, and T. Charoonratana. “MORPHOLOGY STUDY OF PLAI PATCH BY THE SCANNING ELECTRON MICROSCOPE. PART I: CHITOSAN AND HYDROXYPROPYLMETHYLCELLULOSE BLENDS”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 6, no. 7, July 2014, pp. 576-7, https://journals.innovareacademics.in/index.php/ijpps/article/view/1764.