@article{KUKZ_1970_7_7_a4,
     author = {M. I. Gurevich and G. Yu. Stepanov},
     title = {{\CYRK}{\cyrr}{\cyra}{\cyrt}{\cyrk}{\cyri}{\cyrishrt} {\cyro}{\cyrb}{\cyrz}{\cyro}{\cyrr}},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {55--70},
     year = {1970},
     volume = {7},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1970_7_7_a4/}
}