1. Lyapunov design of excitation control for synchronous machines;Bazanella,1997
2. Power Systems Analysis;Bergen,1989
3. A nonlinear control design for power systems;Gao;Automatica,1992
4. An example of nonlinear regulator;Marino;IEEE Trans. Automatic Control,1984
5. Nonlinear Control Design - Geometric;Marino,1995