@article{10_37236_3909,
     author = {P\'eter Hajnal and G\'abor V. Nagy},
     title = {A bijective proof of {Shapiro's} {Catalan} convolution},
     journal = {The electronic journal of combinatorics},
     year = {2014},
     volume = {21},
     number = {2},
     doi = {10.37236/3909},
     zbl = {1300.05023},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/3909/}
}