IbraevaG. T., and TleubergenovM. I. “On the Solvability of the Main Inverse Problem of stochastic differential Systems”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 71, no. 1, Jan. 2019, pp. 139-45, http://umj.imath.kiev.ua/index.php/umj/article/view/1425.