@conference{1990,
  author = {Kevin Heng and Stefan Immler and K. Weiler},
  title = {The Reverse Shock of SNR 1987A},
  year = {2007},
  publisher = {AIP},
  url = {http://link.aip.org/link/APCPCS/v937/i1/p51/s1\&Agg=doi},
  doi = {10.1063/1.2803617},
}