\Bibitem{Bol01} \by E.~A.~Bolotov \paper G.\,N.~Ch\'ebou\"\i ev (necrologue) \jour Sb. Math. \yr 1901 \vol 22 \issue 1 \mathnet{http://mi.mathnet.ru/eng/sm7953} \zmath{https://zbmath.org/?q=an:32.0021.01}