?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A-M&rft.au=El-Sayed%2C+A-M&rft.aulast=El-Sayed&rft.atitle=Optical+signatures+of+intrinsic+electron+localization+in+amorphous+SiO2&rft.volume=27&rft.date=8+July+2015&rft.issue=26&rft.issn=0953-8984&rft.title=Journal+of+Physics%3A+Condensed+Matter&rft.genre=article