@article{CHEB_2020_21_1_a22,
     author = {Yu. N. Shteinikov},
     title = {On the size of the set of the product of sets of rational numbers},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {357--363},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2020_21_1_a22/}
}