J. Suksaeree, C. Monton, and T. Charoonratana, “MORPHOLOGY STUDY OF PLAI PATCH BY THE SCANNING ELECTRON MICROSCOPE. PART I: CHITOSAN AND HYDROXYPROPYLMETHYLCELLULOSE BLENDS”, Int J Pharm Pharm Sci, vol. 6, no. 7, pp. 576–577, Jul. 2014.