1. An analysis of phenomena of voltage collapse on a transmission system;Barbier;Rev. gen. Elect.,1980
2. Power system voltage regulation;Barret;Rev. gen. Elect.,1980
3. A new aspect of studies of reactive energy and voltage of the networks;Blanchon,1972
4. Mathematical models and computing techniques for generator and transmission line voltages following load rejection;Byerly,1969
5. Introduction to Approximation Theory;Cheney,1966