\Bibitem{LokFei96} \by S.~A.~Loktev, B.~L.~Feigin \paper Cohomology of Nilpotent Subalgebras of the Algebra $\widehat{sl_2}$ \jour Funktsional. Anal. i Prilozhen. \yr 1996 \vol 30 \issue 4 \pages 80--83 \mathnet{http://mi.mathnet.ru/faa557} \crossref{https://doi.org/10.4213/faa557} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1444469} \zmath{https://zbmath.org/?q=an:0901.17014} \transl \jour Funct. Anal. Appl. \yr 1996 \vol 30 \issue 4 \pages 285--287 \crossref{https://doi.org/10.1007/BF02509626} \isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=A1996XE19100013}