Parmar, M., N. Puranik, D. Joshi, S. Malpani, and B. Thakare. “State of Art Survey Signature Verification Techniques 2019”. Asian Journal For Convergence In Technology (AJCT), Vol. 5, no. 3, Mar. 2020, pp. 91-96, http://asianssr.org/index.php/ajct/article/view/927.