1. Riffelmann KJ, Graf D, Nava P. ULTIMATE TROUGH – THE NEW PARABOLIC TROUGH COLLECTOR GENERATION FOR LARGE SCALE SOLAR THERMAL POWER PLANTS. Proceedings of ASME 2011 5th International Conference on Energy Sustainability & 9th Fuel Cell Science, Engineering and Technology Conference ESFuelCell2011, August 7-10, 2011, Washington, DC, USA.
2. Schweitzer A, Schiel W, Abul-Ella Z, Nava P, Riffelmann KJ, Wohlfahrt A, Kuhlmann G. ULTIMATE TROUGH® – THE NEXT GENERATION COLLECTOR FOR PARABOLIC TROUGH POWER PLANTS. Proceedings of SolarPACES 2011 Conference, 20-23 September 2011, Granada, Spain.
3. Riffelmann KJ, Graf D, Nava P. SUITIBLE SOLAR FIELD LAYOUTS FOR THE ULTIMATE TROUGH® COLLECTOR. Proceedings of SolarPACES 2011 Conference, 20-23 September 2011, Granada, Spain.
4. Riffelmann KJ, Lüpfert E, Richtert T, Nava P. PERFORMANCE OF THE ULTIMATE TROUGH® COLLECTOR WITH MOLTEN SALTS AS HEAT TRANSFER FLUID. Proceedings of SolarPACES 2012 Conference, September 11-14, 2012, Marrakech, Morocco.
5. Schweitzer A, Schiel W, Birkle, Nava P, Riffelmann KJ, Wohlfahrt A, Kuhlmann G. ULTIMATE TROUGH® - Fabrication, Erection And Commissioning Of The World's largest parabolic trough Collector. Proceedings of SolarPACES 2013 Conference, September 17-20, 2013, Las Vegas, NV, USA.