On word subgroups of free groups
Matematika, Tome 12 (1968) no. 4, pp. 25-41
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@article{MAT_1968_12_4_a2,
author = {P. M. Neumann},
title = {On word subgroups of free groups},
journal = {Matematika},
pages = {25--41},
year = {1968},
volume = {12},
number = {4},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/MAT_1968_12_4_a2/}
}
P. M. Neumann. On word subgroups of free groups. Matematika, Tome 12 (1968) no. 4, pp. 25-41. http://geodesic.mathdoc.fr/item/MAT_1968_12_4_a2/