Functional Integral Approach to the Solution of a System of Stochastic Differential Equations Edik Ayryan, Alexander Egorov, Dmitri Kulyabov, Victor Malyutin and Leonid Sevastianov EPJ Web Conf., 173 (2018) 02003 Published online: 14 February 2018 DOI: 10.1051/epjconf/201817302003