Yevetskyi, Viktor, Ivan Horniichuk, and Hanna Nakonechna. “Influence of Destabilizing Factors on the Stability of user’s Handwritten Signature Indicators”. Information Technology and Security 8, no. 2 (December 30, 2020): 144–152. Accessed July 30, 2021. http://its.iszzi.kpi.ua/article/view/222592.