@article{DM_1990_2_1_a2,
     author = {\`E. A. Primenko and \`E. F. Skvortsov},
     title = {Conditions for regularity of finite autonomous automata},
     journal = {Diskretnaya Matematika},
     pages = {26--30},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1990_2_1_a2/}
}