Phasor-measurement-based voltage stability margin calculation for a power transfer interface with multiple injections and transfer paths. - Scott G. Ghiocel; Joe H. Chow; David B. Bertagnolli; Michael P. Razanousky; George Stefopoulos; Bruce Fardanesh; Deepak Maragal; Michael Swider; Dejan J. Sobajic (PSCC, 2014)