[Defining an Acceptable Level of Environmental Impact [Online]. The global development research center (Tex.), [Accessed 14.12.2009.]. Available: http://www.gdrc.org/uem/e-mgmt/e-mgmt.html#3app-6/]Search in Google Scholar
[Environmental Impact Assessment Regulations and Strategic Environmental Assessment Requirements, 2006. - Washington: The World Bank, 2006.]Search in Google Scholar
[Consideration of Cumulative Impacts in EPA Review of NEPA Documents, 1999. - U. S. Environmental Protection Agency, Office of Federal Activities, 1999.]Search in Google Scholar
[Considering Cumulative Effects Under the National Environmental Policy Act., Executive Office of the President, 1997. - Washington: Council on Environmental Quality, 1997.]Search in Google Scholar
[Fischenich J.The Applicance of Conceptual Models to Ecosystem Restoration, 2008. - ERDC/EBA TN-08-1., 2008.]Search in Google Scholar
[Danilāne D., Gavena I., Kāla A.Environmental Impact Assessment. Riga: Landmark, 2002, 208 p.]Search in Google Scholar
[Overview of sustainable development indicators, 2006 - R.: Latvian Environment, Geology and Meteorology agency, 2007.]Search in Google Scholar
[Mineral resources (construction materials, peat and healing mud) stock balance for year 2008, 2009 - R.: Latvian Environment, Geology and Meteorology agency, 2009.]Search in Google Scholar
[Jordan G. D', Alessandro M.Mining, mining waste and related Environmental issues: problems and solutions in Central and Eastern European Candidate Countries 2004. Ispra: Joint research Centre of the European Commission, LB-NA-20868-NE-C, 2004.]Search in Google Scholar
[Younger P., Banwart S. And Hedin R. Mine Watyer; Hydrology, Pollution, Recomendation. Dordrecht: Kluwer Academic Publishers.]Search in Google Scholar
