@article{JIS_2002__5_1_a3,
     author = {Mansour, Toufik},
     title = {Counting peaks at height $k$ in a {Dyck} path},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2002__5_1_a3/}
}