@article{GDZPPN002186217,
title = {A study in the Lagranges variational problem considered in the large.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {247},
year = {1971},
pages = {20-31},
zbl = {0252.49011},
url = {http://dml.mathdoc.fr/item/GDZPPN002186217}
}
Nikodym, Otton Martin. A study in the Lagranges variational problem considered in the large.. Journal für die reine und angewandte Mathematik, Tome 247 (1971) pp. 20-31. http://gdmltest.u-ga.fr/item/GDZPPN002186217/