?url_ver=Z39.88-2004&rft_id=MTMT%3A28005+10.1002%2Frcm.1290070613&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+Vainiotalo+Pirjo&rft.aufirst=Pirjo&rft.aulast=Vainiotalo&rft.title=RAPID+COMMUNICATIONS+IN+MASS+SPECTROMETRY&rft.issue=6&rft.pages=465-469&rft.date=1993&rft.atitle=Electronic+effects+in+the+electron+ionization+fragmentations+of+2%E2%80%90aryl+substituted+octahydro%E2%80%901%2C3%E2%80%90+and+%E2%80%903%2C1%E2%80%90benzoxazines&rft.volume=7&rft.issn=0951-4198&rft.genre=article