@article{KUKZ_1977_14_14_a9,
     author = {N. B. Il'inskii and A. G. Labutkin and R. B. Salimov},
     title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyra}},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {90--97},
     year = {1977},
     volume = {14},
     number = {14},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1977_14_14_a9/}
}