[1] H.-D. Chiang : Power system stabiity; Wiley En-cyclopedia of Electrical and Electronics Engineering (ed. J. G. Webster), John Wiley & Sons, pp. 105-137 (1999)
[3] NERC Report, Survey of the Voltage Collapse Phenomena, Summary of the Interconnection Dynamics Task Force's Survey on the Voltage Collapse Phenomena (1991)