?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ma&rft.aufirst=W-L&rft.au=Ma%2C+W-L&rft.title=PHYSICAL+REVIEW+B&rft.issn=1098-0121&rft.atitle=Classical+nature+of+nuclear+spin+noise+near+clock+transitions+of+Bi+donors+in+silicon&rft.volume=92&rft.date=8+October+2015&rft.genre=article