1. Voltage Stability of Power Systems: Concepts, Analytical Tools, and Industry Experience;IEEE System Dynamic Performance Subcommittee;IEEE Document No. 90 TH 0358-2-PWR,1990
2. Relationship between voltage instability and multiple load flow solutions in electric power systems;Tamura;IEEE Trans. Power Appar. Syst.,1983
3. Load flow feasibility and the voltage collapse problem;Galiana,1984
4. Voltage collapse proximity indicators computed from an optimal power flow;Carpentier,1984
5. A generalized approach to the analysis of voltage stability in electric power systems;Brucoli;Electr. Power Syst. Res.,1985