1. ACER, 2013. ACER/CEER Annual Report on the Results of Monitoring the Internal Electricity and Natural Gas Markets in 2012, Nov., Ljubljana, at: 〈http://www.acer.europa.eu/Official_documents/Acts_of_the_Agency/Publication/ACER%20Market%20Monitoring%20Report%202013.pdf〉.
2. ACER, 2014a. ACER/CEER Annual Report on the Results of Monitoring the Internal Electricity and Natural Gas Markets in 2013, Oct., Ljubljana, at: 〈http://www.acer.europa.eu/Official_documents/Acts_of_the_Agency/Publication/ACER_Market_Monitoring_Report_2014.pdf〉.
3. ACER, 2014b. Public data underlying the figures of Annual Report on the Results of Monitoring the Internal Electricity and Natural Gas Markets in 2013, at: 〈http://www.acer.europa.eu/Events/Launch-of-the-ACERCEER-Monitoring-report-on-the-internal-electricity-and-gas-markets-/Documents/Public%20dat%20underlying%20the%20figures%20published%20on%20ACER%20CEER%20Annual%20Market%20Monitoring%20Report%202013.pdf〉, (accessed 16.12.14).
4. ACER, 2015. ACER/CEER Annual Report on the Results of Monitoring the Internal Electricity and Natural Gas Markets in 2014, Oct., Ljubljana, at: 〈http://www.acer.europa.eu/Official_documents/Acts_of_the_Agency/Publication/ACER_Market_Monitoring_Report_2015.pdf〉.
5. Böckers, V., Haucap, J., Heimeshoff, U., 2013. Benefits of an Integrated European Electricity Market: the Role of Competition, Annex IV to Cost of Non-Europe in the Single Market for Energy, Report Requested by the General Secretariat of the European Parliament, at: 〈http://www.europarl.europa.eu/RegData/etudes/etudes/join/2013/504466/IPOL-JOIN_ET%282013%29504466%28ANN04%29_EN.pdf〉.