@article{MZ_1918__1_167458,
     author = {T., Carle m an},
     title = {\"Uber ein {Minimalproblem} der mathematischen {Physik}},
     journal = {Mathematische Zeitschrift},
     pages = {208--212},
     publisher = {mathdoc},
     volume = {1},
     year = {1918},
     zbl = {46.0765.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1918__1_167458/}
}