@conference{1906,
  author = {Nathan Smith and Richard McCray and Stefan Immler and K. Weiler},
  title = {High Resolution Spectroscopy of SN1987A'  Rings: He I λ 10830 and Hα from the Hotspots},
  year = {2007},
  journal = {unknown},
  publisher = {AIP},
  doi = {10.1063/1.2803560},
}