@article{JIS_2009__12_7_a0,
     author = {Osgood,  Brad and Wu,  William},
     title = {Falling factorials, generating functions, and conjoint ranking tables},
     journal = {Journal of integer sequences},
     year = {2009},
     volume = {12},
     number = {7},
     zbl = {1215.05008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2009__12_7_a0/}
}