@article{JIS_2010__13_1_a7,
     author = {Pita Ruiz Velasco, Claudio de Jes\'us},
     title = {Convolution and {Sulanke} numbers},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2010__13_1_a7/}
}