@article{JLT_2020_30_4_JLT_2020_30_4_a11,
     author = {J. Ellegaard Andersen and J. C. Jantzen and D. Pei},
     title = {Identities for {Poincar\~A{\textcopyright}} {Polynomials} via {Kostant} {Cascades}},
     journal = {Journal of Lie theory},
     pages = {1131--116},
     year = {2020},
     volume = {30},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/JLT_2020_30_4_JLT_2020_30_4_a11/}
}