@article{SLC_1987_16_a5,
     author = {Jacques Labelle and Yeong Nan Yeh},
     title = {>A {Combinatorial} {Model} for {Hahn} {Polynomials}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {16},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/SLC_1987_16_a5/}
}