Величко, Е. В. “Identification of Parameters Process Described by Hyperbolic Tangent”. Bulletin of V.N. Karazin Kharkiv National University, Series «Mathematical Modeling. Information Technology. Automated Control Systems», Vol. 26, no. 1156, May 2015, pp. 57-62, https://periodicals.karazin.ua/mia/article/view/14214.