%0 Journal Article %A Srovnal, Josef %T Two-parametric systems of three-dimensional spaces in a unimodular six-dimensional affine space %J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica %D 1986 %P 133-155 %V 25 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUPO_1986__25_1_a7/ %G en %F AUPO_1986__25_1_a7