@article{JRAM_1889__105_148754,
     author = {Rudolf Sturm},
     title = {Rein geometrische {Untersuchungen} \"uber algebraische {Minimalfl\"achen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {101--126},
     publisher = {mathdoc},
     volume = {105},
     year = {1889},
     zbl = {21.0807.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1889__105_148754/}
}