%0 Journal Article %A Siddhartha Sahi %T Nonsymmetric Koornwinder polynomials and duality %J Annals of mathematics %D 1999 %V 150 %N 1 %U http://geodesic.mathdoc.fr/articles/10.2307/121102/ %R 10.2307/121102 %F 10_2307_121102