@article{10_37236_579,
     author = {Sen-Peng Eu and Tung-Shan Fu},
     title = {Exterior pairs and up step statistics on {Dyck} paths},
     journal = {The electronic journal of combinatorics},
     year = {2011},
     volume = {18},
     number = {1},
     doi = {10.37236/579},
     zbl = {1217.05023},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/579/}
}