\Bibitem{Koz18} \by V.~V.~Kozlov \paper Multi-Hamiltonian property of a~linear system with quadratic invariant \jour Algebra i Analiz \yr 2018 \vol 30 \issue 5 \pages 159--168 \mathnet{http://mi.mathnet.ru/aa1618} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=3841113} \elib{https://elibrary.ru/item.asp?id=41647264} \transl \jour St. Petersburg Mathematical Journal \yr 2019 \vol 30 \issue 5 \pages 877--883 \crossref{https://doi.org/10.1090/spmj/1574} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000477770800006} \scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-85070540378}