%0 Journal Article %A V. G. Kopp %T On infinitesimal rotations in a six-dimensional pseudo-Euclidean space of signature zero %J Trudy Geometricheskogo Seminara %D 1981 %P 49-56 %V 13 %U http://geodesic.mathdoc.fr/item/KUTGS_1981_13_a5/ %G ru %F KUTGS_1981_13_a5