1. Heat Pump Systems in Sweden – Country Report for IEA HPP;Karlsson,2003
2. Conversion of Electrically Heated Houses – an Overview of Different Configurations for Heating Systems;Sandberg,2003
3. Conversion of Direct-acting Electric Heating in Residential Buildings;Heymowska,05032012
4. Building and Planning, Evaluation of Support for the Conversion from Direct-acting Electric Heating in Residential Buildings;Swedish National Board of Housing,2011
5. Swedish Heat Pump Association, More than 1 million heat pumps in Sweden, press release from 01.20.2011, available from: http://www.svepinfo.se/aktuellt/nyhetsarkiv/2011/fler-an-1-miljon-varmepumpar-i-sverige/, (accessed 18.07.2012). ((in Swedish))