@article{JIS_2009__12_5_a7,
     author = {Adams-Watters, Franklin T. and Ruskey, Frank},
     title = {Generating functions for the digital sum and other digit counting sequences},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {12},
     number = {5},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2009__12_5_a7/}
}