@article{SLC_1995_34_a6,
     author = {Alain Lascoux and Bernard Leclerc and Jean-Yves Thibon},
     title = {Ribbon tableaux, {Hall-Littlewood} functions and unipotent varieties},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {34},
     year = {1995},
     url = {http://geodesic.mathdoc.fr/item/SLC_1995_34_a6/}
}