?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=De+Luca&rft.aufirst=A&rft.au=De+Luca%2C+A&rft.pages=L72+-+L76&rft.volume=421%2C&rft.issue=1&rft.atitle=A+time-variable%2C+phase-dependent+emission+line+in+the+X-ray+spectrum+of+the+isolated+neutron+star+RX+J0822-4300&rft.title=Monthly+Notices+of+the+Royal+Astronomical+Society%3A+Letters&rft.date=March+2012&rft.genre=article