Malik, Fatima H., and Dalal K. Thbayh. “Chitosan Doping by Nicotine As the Active Layer in the Solar Cell”. University of Aden Journal of Natural and Applied Sciences 25, no. 2 (October 31, 2021): 331–339. Accessed April 5, 2025. https://uajnas.adenuniv.com/index.php/uajnas/article/view/129.