1. Graphical analysis of control systems;Evans;Trans. AIEE,1948
2. Lie algebras and linear differential equations;Brockett,1972
3. The Lie groups of simple feedback systems;Brockett;IEEE Decision and Control Conference,1976
4. Lie algebras and rational functions: Some control theoretic connections;Brockett,1978
5. Polynomials, bilinear forms, and representations of Lie algebras;Brockett,1980