Mohammed, Dr. Malek Mostafa, and Zyad Rafa’ a Zair. 2017. “The Effect of Oil and Filer Contents on the Porosity of Lead Acid Battery Separators Produced From Polyethylene”. Al-Khwarizmi Engineering Journal 1 (1): 101-16. https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/25.