Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1939__44_168806, author = {0., Baier}, title = {Ein {Approximationsproblem}}, journal = {Mathematische Zeitschrift}, pages = {293--305}, publisher = {mathdoc}, volume = {44}, year = {1939}, zbl = {64.0360.02}, url = {http://geodesic.mathdoc.fr/item/MZ_1939__44_168806/} }
0., Baier. Ein Approximationsproblem. Mathematische Zeitschrift, Tome 44 (1939), pp. 293-305. http://geodesic.mathdoc.fr/item/MZ_1939__44_168806/