@article{AL_2006_45_6_a5,
     author = {Z. G. Khisamiev},
     title = {Subfamilies of special elements of complete numberings},
     journal = {Algebra i logika},
     pages = {758--764},
     year = {2006},
     volume = {45},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2006_45_6_a5/}
}