  In Dunkl theory on Rd which generalizes classical Fourier analysis, we study
first the behavior at infinity of the Riesz potential of a non compactly
supported function. Second, we give for 1<p<=q<infinite, weighted (Lp,Lq)
boundedness of the Riesz potentials with sufficient conditions. As application,
we prove a weighted generalized Sobolev inequality.
