@article{10_4064_aa156_3_3,
     author = {Liangpan Li and Oliver Roche-Newton},
     title = {Convexity and a sum-product type estimate},
     journal = {Acta Arithmetica},
     pages = {247--255},
     publisher = {mathdoc},
     volume = {156},
     number = {3},
     year = {2012},
     doi = {10.4064/aa156-3-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa156-3-3/}
}