1. Transition to Clean Technology
2. Guidelines for the Support of Measures to Utilise Renewable Energies in the Heat Market;Bafa;Federal Office of Economics and Export Control,2012
3. Merkblatt W�rme-und K�ltespeicher zur Darlegung der Zulassungsvoraussetzungen nach dem Kraft-W�rme-Kopplungsgesetz (KWKG);BAFA,2013
4. Executive Office of the President