@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/