?url_ver=Z39.88-2004&rft_id=10.4229%2F27thEUPVSEC2012-1AV.3.11&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Stephen&rft.aulast=Askins&rft.au=Askins%2C+Stephen&rft.btitle=Proceedings+of+27th+European+Photovoltaic+Solar+Energy+Conference+and+Exhibition&rft.date=2012&rft.title=Optimizing+CPV+Systems+for+Thermal+and+Spectral+Tolerance&rft.genre=proceeding