@article{10_4153_CMB_1969_076_4,
     author = {Williams, Kenneth S.},
     title = {Note on {Factorable} {Polynomials}},
     journal = {Canadian mathematical bulletin},
     pages = {589--595},
     year = {1969},
     volume = {12},
     number = {5},
     doi = {10.4153/CMB-1969-076-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-076-4/}
}