@article{MAN_1967__171_161551,
     author = {K. KOH},
     title = {On },
     journal = {Mathematische Annalen},
     pages = {79--80},
     publisher = {mathdoc},
     volume = {171},
     year = {1967},
     zbl = {0153.06201},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__171_161551/}
}