@article{KYB_1988_24_6_a2,
     author = {Mich\'alek, Ji\v{r}{\'\i}},
     title = {Associated spectra of some non-stationary processes},
     journal = {Kybernetika},
     pages = {428--438},
     year = {1988},
     volume = {24},
     number = {6},
     mrnumber = {975852},
     zbl = {0662.60051},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1988_24_6_a2/}
}