Hashemi, Yashar; Shayeghi, Hossein; Moradzadeh, Mohammad: 'Comparison of stability service cost in power grids considering different types of WTs', IET Renewable Power Generation, 2018, 12, (7), p. 773-786, DOI: 10.1049/iet-rpg.2017.0351
IET Digital Library, https://digital-library.theiet.org/;jsessionid=28x3emucfqdxp.x-iet-live-01content/journals/10.1049/iet-rpg.2017.0351