@article{TRSPY_2018_303_a19,
     author = {Yu. N. Shteinikov},
     title = {On the size of the quotient of two subsets of positive integers},
     journal = {Informatics and Automation},
     pages = {279--287},
     publisher = {mathdoc},
     volume = {303},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2018_303_a19/}
}