%0 Journal Article %A Troják, Jan %A Vanžura, Jiří %T A characterization of hyperspheres in the quaternionic space %J Czechoslovak Mathematical Journal %D 1979 %P 284-286 %V 29 %N 2 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1979.101604/ %R 10.21136/CMJ.1979.101604 %G en %F 10_21136_CMJ_1979_101604