@article{CMH_1936__9_138668,
     author = {L. Kollros},
     title = {Sur un probl\`eme de {Steiner.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {77--78},
     publisher = {mathdoc},
     volume = {9},
     year = {1936},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/CMH_1936__9_138668/}
}