@article{10_37236_473,
     author = {Wenchang Chu},
     title = {Elementary proofs for convolution identities of {Abel} and {Hagen-Rothe}},
     journal = {The electronic journal of combinatorics},
     year = {2010},
     volume = {17},
     doi = {10.37236/473},
     zbl = {1225.05014},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/473/}
}