@article{COMIM_1998__6_1_a17,
     author = {Ku\v{c}era, Radan},
     title = {A generalization of a unit index of {Greither}},
     journal = {Communications in Mathematics},
     pages = {149--154},
     publisher = {mathdoc},
     volume = {06},
     number = {1},
     year = {1998},
     mrnumber = {1822525},
     zbl = {1024.11070},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_1998__6_1_a17/}
}