1. E. M. Andreev and V. L. Popov, “Stationary subgroups of points of general position in the representation space of a semisimple Lie group,” Funkts. Anal. Prilozh. 5 (4), 1–8 (1971) [Funct. Anal. Appl. 5, 265–271 (1971)].
2. A. Borel, Linear Algebraic Groups, 2nd ed. (Springer, New York, 1991), Grad. Texts Math. 126.
3. D. Boularas, “A new classification of planar homogeneous quadratic systems,” Qual. Theory Dyn. Syst. 2, 93–110 (2001).
4. N. Bourbaki, Algebra I. Chapters 1–3 (Hermann, Paris, 1974), Elements of Mathematics.
5. N. Bourbaki, Algebra II. Chapters 4–7 (Springer, Berlin, 1990), Elements of Mathematics.