\Bibitem{GelFeiFuc78} \by I.~M.~Gel'fand, B.~L.~Feigin, D.~B.~Fuchs \paper Cohomology of infinite-dimensional Lie algebras and Laplace operators \jour Funktsional. Anal. i Prilozhen. \yr 1978 \vol 12 \issue 4 \pages 1--5 \mathnet{http://mi.mathnet.ru/faa2023} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=515625} \zmath{https://zbmath.org/?q=an:0396.17008} \transl \jour Funct. Anal. Appl. \yr 1978 \vol 12 \issue 4 \pages 243--247 \crossref{https://doi.org/10.1007/BF01076378}