%0 Journal Article %A Liangpan Li %A Oliver Roche-Newton %T Convexity and a sum-product type estimate %J Acta Arithmetica %D 2012 %P 247-255 %V 156 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa156-3-3/ %R 10.4064/aa156-3-3 %G en %F 10_4064_aa156_3_3