@article{SIGMA_2011_7_a30,
     author = {Ernie G. Kalnins and Jonathan M. Kress and Willard Miller Jr.},
     title = {A~Recurrence {Relation} {Approach} to {Higher} {Order} {Quantum} {Superintegrability}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2011},
     volume = {7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a30/}
}