Pavlović, Jelena, Dane Džepčeski, Vladimir Stanojčić, Dušan Arnautović, Slobodan Bogdanović, Aleksandar Latinović, and Dušan Duboka. 2013. “The Operating Performance Tests of Power Unit A5 in TPP ‘Kolubara’ in Load-Frequency Control”. Proceedings, Electrical Engineering Institute "Nikola Tesla" 23 (23): 75-84. https://doi.org/10.5937/zeint23-4779.