Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1939__45_168837, author = {A., Dinghas}, title = {Zur {Invarianz} der {Shimizu-Ahlforsschen} {Charakteristik}}, journal = {Mathematische Zeitschrift}, pages = {25--28}, publisher = {mathdoc}, volume = {45}, year = {1939}, zbl = {0020.13905}, url = {http://geodesic.mathdoc.fr/item/MZ_1939__45_168837/} }
A., Dinghas. Zur Invarianz der Shimizu-Ahlforsschen Charakteristik. Mathematische Zeitschrift, Tome 45 (1939), pp. 25-28. http://geodesic.mathdoc.fr/item/MZ_1939__45_168837/