@article{ARM_1992__28_1-2_a8,
     author = {Kolibiar, Milan},
     title = {Convex lines in median groups},
     journal = {Archivum mathematicum},
     pages = {67--75},
     publisher = {mathdoc},
     volume = {28},
     number = {1-2},
     year = {1992},
     mrnumber = {1201867},
     zbl = {0783.20038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1992__28_1-2_a8/}
}