Geodesic
On the product sets of rational numbers
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Analytic and combinatorial number theory, Tome 296 (2017), pp. 252-259

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A new lower bound on the size of product sets of rational numbers is obtained. An upper estimate for the multiplicative energy of two sets of rational numbers is also found. 
@article{TM_2017_296_a18,
     author = {Yu. N. Shteinikov},
     title = {On the product sets of rational numbers},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {252--259},
     publisher = {mathdoc},
     volume = {296},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2017_296_a18/}
}
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Yu. N. Shteinikov. On the product sets of rational numbers. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Analytic and combinatorial number theory, Tome 296 (2017), pp. 252-259. http://geodesic.mathdoc.fr/item/TM_2017_296_a18/