@article{VMUMM_1985_3_a20,
     author = {D. N. Babin},
     title = {Verbal subautomata and the completeness problem},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {82--84},
     publisher = {mathdoc},
     number = {3},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1985_3_a20/}
}