1. North American Electric Reliability Council.: Survey of the Voltage Collapse Phenomenon (August 1991)
2. Taylor, C.W.: Power system voltage stability. McGraw-Hill, New York (1994)
3. Kundur, P.: Power System Stability and Control. McGraw- Hill, New York (1994)
4. Kessel, P., Glavitch, H.: Estimating the voltage stability of a power system. IEEE Trans. on power delivery PWRD-1(3), 346–354 (1986)
5. Dobson, I.: The irrelevance of load dynamics for the loading margin to voltage collapse and sensitivities. In: Proc. Bulk Power System Voltage Phenomena III Voltage Stability and Security, pp. 509±18. ECC, Fairfax (August 1994)