Biorthogonal expansion of non-symmetric Jack functions. Sahi, Siddhartha, Zhang, Genkai (2007) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Bochner and Schoenberg theorems on symmetric spaces in the complex case Piotr Graczyk, Jean-Jacques Lœb (1994) Bulletin de la Société Mathématique de France