\Bibitem{KriNov87} \by I.~M.~Krichever, S.~P.~Novikov \paper Algebras of virasoro type, riemann surfaces and structures of the theory of solitons \jour Funktsional. Anal. i Prilozhen. \yr 1987 \vol 21 \issue 2 \pages 46--63 \mathnet{http://mi.mathnet.ru/faa1190} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=902293} \zmath{https://zbmath.org/?q=an:0634.17010} \transl \jour Funct. Anal. Appl. \yr 1987 \vol 21 \issue 2 \pages 126--142 \crossref{https://doi.org/10.1007/BF01078026} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1987L104500005}