1. Report on planning against voltage collapse,1985
2. Bulk Power Systems Voltage Phenomena—Voltage Stability and Security, Engineering Foundation Conf.,1988
3. Present practices and trends on the French power system to prevent voltage collapse;Bourgin,1992
4. Stability enhancement via secondary voltage regulation;Kwatny,1991
5. Improvements in the organization of secondary voltage control in France;Paul;CIGRÉ Rep.,1990