@article{CMUC_1998_39_1_a10,
     author = {W\'ojtowicz, Marek},
     title = {An elementary proof of a theorem on sublattices of finite codimension},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {99--100},
     year = {1998},
     volume = {39},
     number = {1},
     mrnumber = {1622986},
     zbl = {0937.46002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1998_39_1_a10/}
}