@article{AUPO_1986__25_1_a7,
     author = {Srovnal, Josef},
     title = {Two-parametric systems of three-dimensional spaces in a unimodular six-dimensional affine space},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {133--155},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1986},
     mrnumber = {918372},
     zbl = {0639.53010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1986__25_1_a7/}
}