MishuraYu. S., and OltsikYa. O. “Optimal Stopping Times for Solutions of Nonlinear Stochastic Differential Equations and Their Application to One Problem of Financial Mathematics”. Ukrains’kyi Matematychnyi Zhurnal 51, no. 6 (June 25, 1999): 804–809. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4667.