Ah. Dooley et Gk. Zhang, GENERALIZED PRINCIPAL SERIES REPRESENTATIONS OF SL(1+N, C), Proceedings of the American Mathematical Society, 125(9), 1997, pp. 2779-2787
We consider certain induced representations of the group SL(n + 1, C)
realized on line bundles over the projective space of Cn+1. We calcula
te the intertwining operators in the compact picture. We find all the
unitarizable representations and determine the invariant norm.