@inproceedings{SpaeteHafnerSchwarzer2000,
  author    = {Sp{\"a}te, Frank and Hafner, B. and Schwarzer, Klemens},
  title     = {A system for solar process heat for decentralized applications in developing countries},
  series = {ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3},
  booktitle = {ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3},
  publisher = {Elsevier},
  address   = {Oxford},
  isbn      = {0-080-043895-4},
  pages     = {236 -- 291},
  year      = {2000},
  language  = {en}
}
@inproceedings{HoffschmidtSchwarzerSpaeteetal.2006,
  author    = {Hoffschmidt, Bernhard and Schwarzer, Klemens and Sp{\"a}te, Frank and K{\"o}tter, Jens and Ebert, Miriam and Sierck, Olaf},
  title     = {Development of a small modular parabolic trough collector},
  series = {13th International Symposium Concentrated Solar Power and Chemical Energy Technologies : SolarPaces : June 20 - 23, 2006, Seville, Spain},
  booktitle = {13th International Symposium Concentrated Solar Power and Chemical Energy Technologies : SolarPaces : June 20 - 23, 2006, Seville, Spain},
  publisher = {SolarPaces},
  address   = {[o.O.]},
  organization    = {International Symposium on Concentrating Solar Power and Chemical Energy Systems <13, 2006, Sevilla>},
  isbn      = {8478345191},
  pages     = {1 CD-ROM},
  year      = {2006},
  language  = {en}
}