On subnormal subgroups of fundamental groups of certain $3$-manifolds.
نویسندگان
چکیده
منابع مشابه
On subgroups of topologized fundamental groups and generalized coverings
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ژورنال
عنوان ژورنال: Michigan Mathematical Journal
سال: 1971
ISSN: 0026-2285
DOI: 10.1307/mmj/1029000745