http://www.finance.gov.sk/En/Default.aspx?CatID=10&id=77
http://globalarbitrationreview.com/news/article/32743/us-steel-drops-slovakia-claim/ (requires subscription)
http://globalarbitrationreview.com/news/article/31133/slovakia-sued-steelmaker-power-tariffs/ (requires subscription)
http://www.iareporter.com/articles/20130612 (requires subscription)