@article{TRSPY_2017_296_a18,
     author = {Yu. N. Shteinikov},
     title = {On the product sets of rational numbers},
     journal = {Informatics and Automation},
     pages = {252--259},
     year = {2017},
     volume = {296},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2017_296_a18/}
}