1. A. Bialynicki-Birula: Some theorems on actions of algebraic groups, Ann. of Math.
98 (1973), 480–497.
2. L. Bonavero, C. Casagrande, O. Debarre, S. Druel: Sur une conjecture de Mukai, Comment. Math. Helv., (to appear) (math.AG/0204314).
3. M. Brion: Variétés sphériques et théorie de Mori, Duke Math. J.
72 (1993), 369–404.
4. M. Brion: Curves and divisors in spherical varieties. In: Algebraic groups and Lie groups, 21–34, Austral. Math. Soc. Lect. Ser. 9, Cambridge Univ. Press, Cambridge, 1997.
5. H. Clemens, J. Kollar, S. Mori: Higher dimensional complex geometry, Astérisque
166 (1988).