1. Dörr, N., ?Cartan-Algebren und Ol'shanskii-Keile in symmetrischen Lie-Algebren?, Dissertation, Technische Hochschule Darmstadt, 1991.
2. Faraut, J., ?Espaces symétriques ordonnés et algèbre de Volterra?,J. Math. Soc. Japan 43 (1991), 134?147.
3. Faraut, J., Hilgert, J. and Olafsson, G., ?Analysis on ordered symmetric spaces? (in preparation).
4. Helgason, S.,Differential Geometry, Lie Groups, and Symmetric Spaces, Academic Press, London, 1978.
5. Hilgert, J., Hofmann, K. H. and Lawson, J. D.,Lie Groups, Convex Cones, and Semigroups, Oxford University Press, 1989.