@article{JIS_2015__18_11_a4,
     author = {Christopher, David},
     title = {Partitions with fixed number of sizes},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {18},
     number = {11},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2015__18_11_a4/}
}