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On word subgroups of free groups
P. M. Neumann
Citation:
P. M. Neumann, “On word subgroups of free groups”, Matematika, 12:4 (1968), 25–41; Arch. Math., 16 (1965), 6–21
Linking options:
https://www.mathnet.ru/eng/mat471 https://www.mathnet.ru/eng/mat/v12/i4/p25
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