\Bibitem{GelDor82} \by I.~M.~Gel'fand, I.~Ya.~Dorfman \paper Hamiltonian operators and the classical Yang--Baxter equation \jour Funktsional. Anal. i Prilozhen. \yr 1982 \vol 16 \issue 4 \pages 1--9 \mathnet{http://mi.mathnet.ru/faa1663} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=684122} \zmath{https://zbmath.org/?q=an:0527.58018} \transl \jour Funct. Anal. Appl. \yr 1982 \vol 16 \issue 4 \pages 241--248 \crossref{https://doi.org/10.1007/BF01077846} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1982QT19600001}