Kazmi, M., F. Yasir, S. Habib, M. S. Hayat, and S. A. Qazi. “Photometric Ligature Extraction Technique for Urdu Optical Character Recognition”. Engineering, Technology & Applied Science Research 11, no. 6 (December 11, 2021): 7968–7973. Accessed July 6, 2022. https://etasr.com/index.php/ETASR/article/view/4596.