@article{SIGMA_2011_7_a50,
     author = {Ernie G. Kalnins and Willard Miller Jr. and Sarah Post},
     title = {Two-Variable {Wilson} {Polynomials} and the {Generic} {Superintegrable} {System} on the $3${-Sphere}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2011},
     volume = {7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a50/}
}