@article{HoffschmidtPitzPaalBoehmer2006, author = {Bernhard Hoffschmidt and Robert Pitz-Paal and M. B{\"o}hmer}, title = {A new closed/open volumetric receiver concept for parabolictrough collectors (test results)}, journal = {Journal de physique. 9 (1999), H. 3}, pages = {3}, year = {2006}, }