1. Power System Voltage Stability;Taylor,1994
2. Voltage stability conditions considering load characteristics;Pal;IEEE Trans. Power Syst.,1992
3. On bifurcation voltage collapse and load modeling;Cañizares;IEEE Trans. Power Syst.,1995
4. Voltage Stability of Electric Power Systems;Van Cutsem,1998
5. Voltage Stability Assessment: Concepts, Practices and Tools – PES-TR9;Cañizares,2002