@article{CHEB_2017_18_4_a20,
     author = {A. I. Nijnikov and V. N. Chubarikov and A. R. Esayan and N. M. Dobrovol'skii},
     title = {In memory of a friend},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {348--351},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2017_18_4_a20/}
}