• Analysis of electricity cost as a driver of competitiveness in Nothern Europe : the case of Estonia [Electronic resource]Viiding, Marko; Kallemets, Kalev; Pikk, PeeterDoctoral Summer School 2011 : doctoral school in economics and innovation : 25-28 July 2011, Viinistu, Estonia2011 / [CD-ROM]
• Electricity cost as a driver of competitiveness in Northern Europe : the case of EstoniaViiding, Marko; Kallemets, Kalev; Pikk, PeeterTransition Studies Review2013 / p. 367-381 http://doi.org/10.1007/s11300-012-0252-4 http://www.springerlink.com/openurl.asp?genre=article&id=doi:10.1007/s11300-012-0252-4 https://www.scopus.com/sourceid/144828 https://www.scopus.com/record/display.uri?eid=2-s2.0-84873747770&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1007%2Fs11300-012-0252-4%29&sessionSearchId=7c6b672404e1b83bceae9002c7d84c88
• The dangers of marginal cost based electricity pricing [Electronic resource]Pikk, Peeter-Jass; Viiding, Marko4th International Conference "Economic Challenges in Enlarged Europe" : 17-19 June 2012, Tallinn, Estonia : conference proceedings2012 / 14 p. : ill. [CD-ROM] https://www.tandfonline.com/doi/abs/10.1080/1406099X.2013.10840525
• The dangers of marginal cost based electricity pricing [Electronic resource]Pikk, Peeter-Jass; Viiding, MarkoDoctoral Summer School 2012 : doctoral school in economics and innovation : 24-27 July 2012, Nelijärve, Estonia2012 / 12 p. : ill [CD-ROM]