\Bibitem{Ols68}
\by A.~Yu.~Ol'shanskii
\paper On a problem of Hanna Neumann
\jour Math. USSR-Sb.
\yr 1968
\vol 5
\issue 3
\pages 429--432
\mathnet{http://mi.mathnet.ru/eng/sm4029}
\crossref{https://doi.org/10.1070/SM1968v005n03ABEH003625}
\mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=227256}
\zmath{https://zbmath.org/?q=an:0205.03101|0174.04703}
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https://www.mathnet.ru/eng/sm4029
https://doi.org/10.1070/SM1968v005n03ABEH003625
https://www.mathnet.ru/eng/sm/v118/i3/p449
This publication is cited in the following 1 articles:
E. I. Timoshenko, “On the decomposition of partially commutative groups of varieties and their defining graphs”, Siberian Math. J., 62:4 (2021), 742–746
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