@article{SIGMA_2010_6_a89,
     author = {F. Alberto Gr\"unbaum and Mizan Rahman},
     title = {On {a~Family} of $2${-Variable} {Orthogonal} {Krawtchouk} {Polynomials}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2010},
     volume = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2010_6_a89/}
}