On some series of representations related to symmetric spaces H. Schlichtkrull — 1984 Mémoires de la Société Mathématique de France
Asymptotic expansions and boundary values of eigenfunctions on Riemannian symmetric spaces. H. Schlichtkrull; E.P. van den Ban — 1987 Journal für die reine und angewandte Mathematik
Local boundary data of eigenfunctions on a Riemannian symmetric space. E.P.van den Ban; H. Schlichtkrull — 1989 Inventiones mathematicae
Convexity for invariant differential operators on semisimple symmetric spaces E. P. Van den Ban; H. Schlichtkrull — 1993 Compositio Mathematica