\Bibitem{ZorLyu88} \by V.~A.~Zorin, A.~K.~Lyubimov \paper Distribution of Quadratic Forms of Gaussian Vectors \jour Teor. Veroyatnost. i Primenen. \yr 1988 \vol 33 \issue 3 \pages 597--600 \mathnet{http://mi.mathnet.ru/tvp3720} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=968408} \zmath{https://zbmath.org/?q=an:0715.60015|0669.60021} \transl \jour Theory Probab. Appl. \yr 1988 \vol 33 \issue 3 \pages 557--560 \crossref{https://doi.org/10.1137/1133084} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1988AL62800017}