Convolution algebras for Heckman–Opdam polynomials derived from compact Grassmannians
M. Rösler, H. Remling, Journal of Approximation Theory 197 (2014) 30–48.

Asymptotic Analysis for the Dunkl Kernel
M. Rösler, M. de Jeu, Journal of Approximation Theory 119 (2002) 110–126.