Guanqun Wang, ; Chen-Ching Liu, ; Farantatos, Evangelos; Bhatt, Navin: 'PMU-based vulnerability assessment of power systems' (Energy Engineering, 2017), 'Synchronized Phasor Measurements for Smart Grids', Chap. 8, pp. 211-229, DOI: 10.1049/PBPO097E_ch8
IET Digital Library, https://digital-library.theiet.org/;jsessionid=a77msomqj41b0.x-iet-live-01content/books/10.1049/pbpo097e_ch8