TY - JOUR AU - Ernest G. Kalnins AU - Willard Miller Jr. AU - Sarah Post TI - Contractions of 2D 2nd Order Quantum Superintegrable Systems and the Askey Scheme for Hypergeometric Orthogonal Polynomials JO - Symmetry, integrability and geometry: methods and applications PY - 2013 VL - 9 UR - http://geodesic.mathdoc.fr/item/SIGMA_2013_9_a56/ LA - en ID - SIGMA_2013_9_a56 ER -