@article{CMH_1949__23_138974,
     author = {Thiem Le-Van},
     title = {\"Uber das {Umkehrproblem} der {Wertverteilungslehre.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {26--49},
     publisher = {mathdoc},
     volume = {23},
     year = {1949},
     zbl = {0041.04503},
     url = {http://geodesic.mathdoc.fr/item/CMH_1949__23_138974/}
}