@article{MASLO_1998__48_1_a5,
     author = {Chv\'al, Viliam and Jurga, Rastislav},
     title = {Tangents of conics in {Hjelmslev} planes over a local ring of even characteristic},
     journal = {Mathematica slovaca},
     pages = {69--78},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {1998},
     mrnumber = {1635243},
     zbl = {0940.51002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1998__48_1_a5/}
}