@article{O'Brien2006,
  author    = {Patrick J. O'Brien},
  title     = {The age of deep, steep continental subduction in the NW Himalaya : relating zircon growth to metamorphic history. Comment on: "The onset of India-Asia continental collision: Early, steep subduction required by the timing of UHP metamorphism in the western Himalaya" by Mary L. Leech, S. Singh, A.K. Jain, Simon L. Klemperer and R.M. Manickavasagam, Earth and Planetary Science Letters 234 (2005) 83-97},
  doi       = {10.1016/j.epsl.2006.03.033},
  url       = {http://www.sciencedirect.com/science/journal/0012821X},
  year      = {2006},
}