@article{05122321, title = {Sets with more sums than differences.}, journal = {Integers}, volume = {7}, year = {2007}, zbl = {1107.11017}, language = {en}, url = {http://dml.mathdoc.fr/item/05122321} }
Nathanson, Melvyn B. Sets with more sums than differences.. Integers, Tome 7 (2007) . http://gdmltest.u-ga.fr/item/05122321/