Mays M. Taher, and Dr. Loay E. George. “A Digital Signature System Based on Hand Geometry - Survey: Basic Components of Hand-Based Biometric System”. Wasit Journal of Computer and Mathematics Science, vol. 1, no. 1, Mar. 2022, pp. 1-9, https://doi.org/10.31185/wjcm.Vol1.Iss1.18.