@article{AUPO_1971__11_1_a8,
     author = {Markov\'a, Libu\v{s}e},
     title = {Semicanonical moving frame of the hypersurface in a unimodular 4-dimensional affine space},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {103--107},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1971},
     mrnumber = {0336565},
     zbl = {0263.53010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1971__11_1_a8/}
}