Spherical roots of spherical varieties

Knop, Friedrich

Annales de l'Institut Fourier, Volume 64 (2014) p. 2503-2526

A construction of semisimple tensor categories

Knop, Friedrich

Comptes Rendus. Mathématique, Volume 343 (2006) p. 15-18

Homogeneous varieties for semisimple groups of rank one

Knop, Friedrich

Compositio Mathematica, Volume 98 (1995) p. 77-89