Chow Khim, Tan, Mohd Ambar Yarmo, Shahidan Radiman, and Anita Ramli. 2002. “XPS Analysis of Dispersed Catalysts Prepared via w/O Microemulsion”. Malaysian Journal of Science 21 (December):185-89. https://juku.um.edu.my/index.php/MJS/article/view/8886.