%0 Journal Article %A Węgrzynowski, Stefan %T Parallel and nonparallel $s$-structures on Euclidean spaces %J Czechoslovak Mathematical Journal %D 1983 %P 76-94 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1983.101857/ %R 10.21136/CMJ.1983.101857 %G en %F 10_21136_CMJ_1983_101857