1. Stability problems associated with large generators connected to the transmission system of England and Wales;Berrie,1962
2. The influence of the regulating transformers and the excitation of alternators on system voltages and stability;Csisy,1962
3. Voltage stability of radial power links;Weedy,1968
4. Criteria for power system voltage stability by steady-state analysis;Abe,1975
5. Voltage collapse at load ends of power systems;Nagao;Electr. Eng. Jpn.,1975