@article{10_21136_CMJ_1979_101604,
     author = {Troj\'ak, Jan and Van\v{z}ura, Ji\v{r}{\'\i}},
     title = {A characterization of hyperspheres in the quaternionic space},
     journal = {Czechoslovak Mathematical Journal},
     pages = {284--286},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1979},
     doi = {10.21136/CMJ.1979.101604},
     mrnumber = {529515},
     zbl = {0393.53034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1979.101604/}
}