1. Alexeev, V., Brion, M.: Boundedness of spherical Fano varieties. The Fano Conference, Univ. Torino, Turin, pp. 69–80 (2004)
2. Alexeev, V., Brion, M.: Stable spherical varieties and their moduli. IMRP Int. Math. Res. Pap., Art. ID 46293, 57pp (2006)
3. Avdeev, R., Cupit-Foutou, S.: On the irreducible components of moduli schemes for affine spherical varieties. Transform. Groups 23(2), 299–327 (2018)
4. Avdeev, R., Cupit-Foutou, S.: New and old results on spherical varieties via moduli theory. Adv. Math. 328, 1299–1352 (2018)
5. Biliotti, L., Ghigi, A., Heinzner, P.: A remark on the Gradient Map. Doc. Math. 19, 1017–1023 (2014)