@article{KYB_1969_5_6_a5,
     author = {Havel, Ivan M.},
     title = {The theory of regular events. {II}},
     journal = {Kybernetika},
     pages = {520--544},
     year = {1969},
     volume = {5},
     number = {6},
     mrnumber = {0256787},
     zbl = {0184.28703},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1969_5_6_a5/}
}