%0 Journal Article %A K. Ford %T Extremal properties of product sets %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2018 %P 239-245 %V 303 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2018_303_a16/ %G ru %F TM_2018_303_a16