@article{DM_2004_16_4_a7,
     author = {I. S. Grunskii and A. S. Senchenko},
     title = {Properties of systems of defining relations for automata},
     journal = {Diskretnaya Matematika},
     pages = {79--87},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2004_16_4_a7/}
}