Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1943__49_169035, author = {F. L\"obell}, title = {Zur {Theorie} der {Fl\"achenabbildungen}}, journal = {Mathematische Zeitschrift}, pages = {427--440}, publisher = {mathdoc}, volume = {49}, year = {1943}, zbl = {0028.42402}, url = {http://geodesic.mathdoc.fr/item/MZ_1943__49_169035/} }
F. Löbell. Zur Theorie der Flächenabbildungen. Mathematische Zeitschrift, Tome 49 (1943), pp. 427-440. http://geodesic.mathdoc.fr/item/MZ_1943__49_169035/