@misc{10025,
  author = {C. Sullivan and R. Omar and G. Ambler and A. Majeed},
  title = {Case-mix and variation in specialist referrals in general practice},
  year = {2005},
  journal = {Br J Gen Pract},
  volume = {55},
  number = {516},
  pages = {529-33},
  issn = {0960-1643 (Print) 0960-1643},
}