\Bibitem{Saf91} \by R.~G.~Safaryan \paper A~class of random processes and corresponding systems of differential equations with a~small parameter \jour Teor. Veroyatnost. i Primenen. \yr 1991 \vol 36 \issue 4 \pages 682--698 \mathnet{http://mi.mathnet.ru/tvp1776} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1147170} \zmath{https://zbmath.org/?q=an:0776.60075|0741.60062} \transl \jour Theory Probab. Appl. \yr 1991 \vol 36 \issue 4 \pages 722--737 \crossref{https://doi.org/10.1137/1136088} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1991KG46300006}