@article{05014508,
title = {A bijective proof of },
journal = {Integers},
volume = {6},
year = {2006},
zbl = {1134.11305},
language = {en},
url = {http://dml.mathdoc.fr/item/05014508}
}
Matchett Wood, Philip. A bijective proof of . Integers, Tome 6 (2006) . http://gdmltest.u-ga.fr/item/05014508/