RANGKUPAN, Ratthapol, and Darrell H. RENEKER. 2022. “Electrospinning Process of Molten Polypropylene in Vacuum”. Journal of Metals, Materials and Minerals 12 (2). Bangkok, Thailand:81-87. https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/1290.