@article{CHEB_2015_16_3_a13,
     author = {P. L. Ivankov},
     title = {On simultaneous approximations},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {295--305},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2015_16_3_a13/}
}