\Bibitem{1} \paper Ernest Borisovich Vinberg \jour Funktsional. Anal. i Prilozhen. \yr 2020 \vol 54 \issue 3 \pages 3--7 \mathnet{http://mi.mathnet.ru/faa3824} \crossref{https://doi.org/10.4213/faa3824} \mathscinet{https://mathscinet.ams.org/mathscinet-getitem?mr=4136850}