1. [B] Brun J Sur la simplification par les variétes homogènes,Math. Ann. 235 (1977), 175–183
2. [Ca] Carter R W,Simple groups of Lie type (1972) (London, New York: J. Wiley)
3. [He] Helgason S,Differential geometry, Lie groups and symmetric spaces (1978) (New York, London: Academic Press)
4. [Hi H] Hilgert J and Hofmann K H, Old and new on S1(2).Manuscripta Math. 54 (1985) 17–52
5. [K M] Kelly-Lyth D and McCrudden M, Supports of Gauss measures on semisimple Lie groups, PreprintMath. Zeit. (to appear)