Liew, Shu Qing, Yit Kwan Lee, Fei Wang, Kiat Moon Lee, Hung Yang Leong, and Swee Pin Yeap. “Formation of Polyaniline (PANI) Multilayer Film Using Humic Acid As the Bridging Agent: Screening on the Fabrication Technique”. Progress in Energy and Environment 20 (September 21, 2022): 16–23. Accessed May 4, 2024. https://www.akademiabaru.com/submit/index.php/progee/article/view/4444.