@article{KYB_1988__24_1_a1,
     author = {Mich\'alek, Ji\v{r}{\'\i}},
     title = {Normal covariances},
     journal = {Kybernetika},
     pages = {17--27},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {1988},
     mrnumber = {936550},
     zbl = {0641.60043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1988__24_1_a1/}
}