Shen, Cheng-Chieh; Lin, Chien-Hung; Chang-Chien, Le-Ren; Wu, Chin-Chung; Lu, Chan-Nan: 'Assessment of cycling costs of combined cycle units for frequency regulation', IET Generation, Transmission & Distribution, 2018, 12, (14), p. 3536-3541, DOI: 10.1049/iet-gtd.2017.1585
IET Digital Library, https://digital-library.theiet.org/;jsessionid=8h1scpds8oi5k.x-iet-live-01content/journals/10.1049/iet-gtd.2017.1585