Economics of renewable generation in Estonian electricity marketKnõš, Izabella; Landsberg, Mart; Valtin, Juhan12th International Symposium "Topical Problems in the Field of Electrical and Power Engineering." Doctoral School of Energy and Geotechnology II : Kuressaare, Estonia, June 11-16, 20122012 / p. 103-109 : ill The challenges for fossil fuel power system associated with integration of large scale renewable generationKnõš, Izabella; Landsberg, Mart; Valtin, JuhanProceedings of the 2014 International Conference & Utility Exhibition on Green Energy for Sustainable Development (ICUE) : Jomtien Palm Beach Hotel and Resort, Pattaya City, Thailand 19-21 March 20142014 / [8 p] https://ieeexplore.ieee.org/document/6828891