%0 Journal Article %A Bureš, Jarolím %T Deformation and equivalence $G$-structures. Part I. $\{e\}$-structures %J Czechoslovak Mathematical Journal %D 1972 %P 641-652 %V 22 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1972.101131/ %R 10.21136/CMJ.1972.101131 %G en %F 10_21136_CMJ_1972_101131