1. Marx, R.; Ochs, F.; Heidemann, W.; Müller-Steinhagen, H.: Innovative Example for Central Solar Heating Plant with Seasonal Thermal Energy Storage in Germany. ISES Solar World Congress, October 11th – 14th, Sandton Convention Centre, Johannesburg, South Africa, 2009.
2. Ochs, F.; Nußbicker-Lux, J.; Marx, R.; Koch, H.; Heidemann, W.; Müller-Steinhagen, H.: Solar assisted district heating system with seasonal thermal energy storage in Eggenstein-Leopoldshafen. EuroSun 2008, October 08th – 10th, Sandton Lissabon, 2008.
3. http://www.einstein-project.eu/.