@conference{5497,
  author = {R. Walterbos and Michael Steakley and Q. Wang and Robert Braun},
  title = {The soft X-ray halo of the spiral galaxy NGC 4631},
  year = {1994},
  publisher = {AIP},
  address = {College Park, Maryland (USA)},
  url = {http://link.aip.org/link/APCPCS/v313/i1/p173/s1\&Agg=doi},
  doi = {10.1063/1.46707},
}