@article{05769519, title = {On zero-sum free subsets of length 7.}, journal = {The Electronic Journal of Combinatorics [electronic only]}, volume = {17}, year = {2010}, zbl = {1231.05295}, language = {en}, url = {http://dml.mathdoc.fr/item/05769519} }
Yuan, Pingzhi; Zeng, Xiangneng. On zero-sum free subsets of length 7.. The Electronic Journal of Combinatorics [electronic only], Tome 17 (2010) . http://gdmltest.u-ga.fr/item/05769519/