%0 Journal Article %A Havel, Ivan M. %T Regular expressions over generalized alphabet and design of logical nets %J Kybernetika %D 1968 %P 516-537 %V 4 %N 6 %U http://geodesic.mathdoc.fr/item/KYB_1968_4_6_a1/ %G en %F KYB_1968_4_6_a1