@article{SEMR_2006_3_a37,
     author = {N. S. Vinokurov},
     title = {Index sets of classes in automatic structures},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {153--154},
     publisher = {mathdoc},
     volume = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2006_3_a37/}
}