SverdanM. L., YurchenkoI. V., and YasinskyV. K. “On One Problem of Stochastic Control”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 47, no. 11, Nov. 1995, pp. 1566–1573, https://umj.imath.kiev.ua/index.php/umj/article/view/5548.