Bhutto, Ali Asghar, and Barbara J. Gabrys. “MORPHOLOGY AND DIFFUSION STUDY OF POLYSTYRENE WITH POLY (VINYL METHYL ETHER) BLEND”. Journal of Research (Science), vol. 15, no. 1, July 2004, pp. Pages: 01-07, http://jorscience.com/index.php/JRS/article/view/164.