Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1963__82_170184, author = {Johann Sonner}, title = {Universal and special problems.}, journal = {Mathematische Zeitschrift}, pages = {200--211}, publisher = {mathdoc}, volume = {82}, year = {1963}, zbl = {0129.01202}, url = {http://geodesic.mathdoc.fr/item/MZ_1963__82_170184/} }
Johann Sonner. Universal and special problems.. Mathematische Zeitschrift, Tome 82 (1963), pp. 200-211. http://geodesic.mathdoc.fr/item/MZ_1963__82_170184/