@article{1002,
  author = {P. Crowther and Peter Conti},
  title = {MSX mid-infrared imaging of massive star birth environments — I. Ultracompact H II regions},
  year = {2003},
  journal = {Monthly Notices of the Royal Astronomical Society},
  volume = {343},
  pages = {143-163},
  month = {Sep-07-2004},
  issn = {0035-8711},
  doi = {10.1046/j.1365-8711.2003.06646.x},
}