?url_ver=Z39.88-2004&rft_id=10.1063%2F1.4931510&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Enrique&rft.aulast=Barrig%C3%B3n+Monta%C3%B1%C3%A9s&rft.au=Barrig%C3%B3n+Monta%C3%B1%C3%A9s%2C+Enrique&rft.btitle=AIP+Conference+Proceedings&rft.date=April+2015&rft.title=Why+can't+I+measure+the+external+quantum+efficiency+of+the+Ge+subcell+of+my+multijunction+solar+cell%3F&rft.issn=0094-243X&rft.genre=proceeding