@article{CHEB_2017_18_1_a1,
     author = {M. G. Bashmakova and E. S. Zolotukhina},
     title = {On irrationality measure
},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {29--43},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2017_18_1_a1/}
}