@article{10_37236_3032,
     author = {Yidong Sun},
     title = {A simple proof of an identity of {Lacasse}},
     journal = {The electronic journal of combinatorics},
     year = {2013},
     volume = {20},
     number = {2},
     doi = {10.37236/3032},
     zbl = {1267.05027},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/3032/}
}