@article{GDZPPN002055112,
title = {Ein geometrisches Minimumproblem.},
journal = {Commentarii mathematici Helvetici},
volume = {22},
year = {1949},
pages = {103-114},
zbl = {0031.17604},
url = {http://dml.mathdoc.fr/item/GDZPPN002055112}
}
Bieri, Hans. Ein geometrisches Minimumproblem.. Commentarii mathematici Helvetici, Tome 22 (1949) pp. 103-114. http://gdmltest.u-ga.fr/item/GDZPPN002055112/