\Bibitem{Tsv77} \by V.~M.~Tsvetkov \paper On the Euler--Poincare characteristic of pro-$p$-groups \inbook Modules and representations \serial Zap. Nauchn. Sem. LOMI \yr 1977 \vol 71 \pages 256--258 \publ "Nauka", Leningrad. Otdel. \publaddr Leningrad \mathnet{http://mi.mathnet.ru/znsl2912} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=480458} \zmath{https://zbmath.org/?q=an:0422.20041|0497.20043} \transl \jour J. Soviet Math. \yr 1982 \vol 20 \issue 6 \pages 2697--2699 \crossref{https://doi.org/10.1007/BF01681483}