@article{MZ_1921__9_167618,
     author = {T., Carleman},
     title = {Zur {Theorie} der {Minimalfl\"achen}},
     journal = {Mathematische Zeitschrift},
     pages = {154--160},
     publisher = {mathdoc},
     volume = {9},
     year = {1921},
     zbl = {48.0590.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1921__9_167618/}
}