1. Environmental Health Criteria Monograph No.238: Extremely Low Frequency Fields
http://www.who.int/peh-emf/publications/elf_ehc/en/
2. Magnetic Emissions of Electric Appliances;Leitgeb;Int. J. Hyg. Environ. Health,2008
3. ENTSO-E Statistical Yearbook, 2009
https://www.entsoe.eu/fileadmin/user_upload/_library/publications/entsoe/Statistical_Yearbook/101124_SYB_2009.pdf
4. COM Commission of the European Communities Background Paper Undergrounding of Electricity Lines in Europe, 2003
http://ec.europa.eu/energy/gas_electricity/studies/doc/electricity/2003_12_undergrounding.pdf
5. Overview of the Potential for Undergrounding the Electricity Networks in Europe
https://ec.europa.eu/energy/sites/ener/files/documents/2003_02_underground_cables_icf.pdf