@article{DM_1993_5_4_a3,
     author = {I. S. Grunskii and O. M. Kopytova},
     title = {Indistinguishability of finite automata in a~stationary observation environment},
     journal = {Diskretnaya Matematika},
     pages = {43--53},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1993_5_4_a3/}
}