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@article{MS2_1959__7_165700, author = {Josef Weier}, title = {Invariante {Schnittsysteme} stetiger {Transformationen.}}, journal = {Mathematica Scandinavica}, pages = {33--48}, publisher = {mathdoc}, volume = {7}, year = {1959}, zbl = {0101.16401}, url = {http://geodesic.mathdoc.fr/item/MS2_1959__7_165700/} }
Josef Weier. Invariante Schnittsysteme stetiger Transformationen.. Mathematica Scandinavica, Tome 7 (1959), pp. 33-48. http://geodesic.mathdoc.fr/item/MS2_1959__7_165700/