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@article{MZ_1955__62_169499, author = {Robert G. Bartle}, title = {Implicit functions and solutions of equations in groups.}, journal = {Mathematische Zeitschrift}, pages = {335--346}, publisher = {mathdoc}, volume = {62}, year = {1955}, zbl = {0064.26001}, url = {http://geodesic.mathdoc.fr/item/MZ_1955__62_169499/} }
Robert G. Bartle. Implicit functions and solutions of equations in groups.. Mathematische Zeitschrift, Tome 62 (1955), pp. 335-346. http://geodesic.mathdoc.fr/item/MZ_1955__62_169499/