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@article{MAN_1964__155_161188, author = {K. MURASUGI}, title = {The {Center} of a {Group} with a {Single} {Defining} {Relation.}}, journal = {Mathematische Annalen}, pages = {246--251}, publisher = {mathdoc}, volume = {155}, year = {1964}, zbl = {0119.02601}, url = {http://geodesic.mathdoc.fr/item/MAN_1964__155_161188/} }
K. MURASUGI. The Center of a Group with a Single Defining Relation.. Mathematische Annalen, Tome 155 (1964), pp. 246-251. http://geodesic.mathdoc.fr/item/MAN_1964__155_161188/