@article{MAN_1929__101_159361,
     author = {M. Kerner},
     title = {Die {Transversalenkr\"ummungsmethode} und ihre {Anwendung} auf geschlossene {Extremalen.}},
     journal = {Mathematische Annalen},
     pages = {633--671},
     publisher = {mathdoc},
     volume = {101},
     year = {1929},
     zbl = {55.0907.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1929__101_159361/}
}