\Bibitem{Kam93} \by S.~F.~Kamornikov \paper On some properties of the formation of quasinilpotent groups \jour Mat. Zametki \yr 1993 \vol 53 \issue 2 \pages 71--77 \mathnet{http://mi.mathnet.ru/mzm3949} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1220811} \zmath{https://zbmath.org/?q=an:0810.20015} \transl \jour Math. Notes \yr 1993 \vol 53 \issue 2 \pages 163--166 \crossref{https://doi.org/10.1007/BF01208320} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1993MY10400030}