%0 Journal Article %A Alexander A. Razborov %T A product theorem in free groups %J Annals of mathematics %D 2014 %P 405-429 %V 179 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2014.179.2.1/ %R 10.4007/annals.2014.179.2.1 %G en %F 10_4007_annals_2014_179_2_1