@article{02161321, title = {A combinatorial proof of a symmetric }, journal = {The Electronic Journal of Combinatorics [electronic only]}, volume = {12}, year = {2005}, zbl = {1060.05011}, language = {en}, url = {http://dml.mathdoc.fr/item/02161321} }
Guo, Victor J.W.; Zeng, Jiang. A combinatorial proof of a symmetric . The Electronic Journal of Combinatorics [electronic only], Tome 12 (2005) . http://gdmltest.u-ga.fr/item/02161321/