@article{CMUC_1987__28_2_a14,
     author = {Karger, Adolf},
     title = {Affine space motions with only plane trajectories},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {337--343},
     publisher = {mathdoc},
     volume = {28},
     number = {2},
     year = {1987},
     mrnumber = {904758},
     zbl = {0627.53005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1987__28_2_a14/}
}