Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1950__53_169165, author = {K. NICKEL}, title = {L\"osung eines speziellen {Minimumproblems}}, journal = {Mathematische Zeitschrift}, pages = {21--52}, publisher = {mathdoc}, volume = {53}, year = {1950}, zbl = {0040.34801}, url = {http://geodesic.mathdoc.fr/item/MZ_1950__53_169165/} }
K. NICKEL. Lösung eines speziellen Minimumproblems. Mathematische Zeitschrift, Tome 53 (1950), pp. 21-52. http://geodesic.mathdoc.fr/item/MZ_1950__53_169165/