Nonsymmetric interpolation Macdonald polynomials and g_n basic   hypergeometric series
  The Knop-Sahi interpolation Macdonald polynomials are inhomogeneous and nonsymmetric generalisations of the well-known Macdonald polynomials. In this paper we apply the interpolation Macdonald polynomials to study a new type of basic hypergeometric series of type g_n. Our main results include a new q-binomial theorem, new q-Gauss sum, and several transformation formulae for g_n series. 
Alain Lascoux, Eric M. Rains and S. Ole Warnaar