@article {IOPORT.05249215,
    author       = {Guo, Victor J.W.},
    title        = {Bijective proofs of Gould's and Rothe's identities.},
    year         = {2008},
    journal      = {Discrete Mathematics},
    volume       = {308},
    number       = {9},
    issn         = {0012-365X},
    pages        = {1756-1759},
    publisher    = {Elsevier Science B.V. (North-Holland), Amsterdam},
    doi          = {10.1016/j.disc.2007.04.020},
    abstract     = {Summary: We first give a bijective proof of Gould's identity in the model of binary words. Then we deduce Rothe's identity from Gould's identity again by a bijection, which also leads to a double-sum extension of the $q$-Chu-Vandermonde formula.},
    identifier   = {05249215},
}