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References

  • Cameron, S.A., Hines, H.M. & Williams, P.H. (2007) A comprehensive phylogeny of the bumble bees (Bombus). Biological Journal of the Linnean Society, 91, 161-188.
  • Williams, P.H. (2007) The distribution of bumblebee colour patterns world-wide: possible significance for thermoregulation, crypsis, and warning mimicry. Biological Journal of the Linnean Society, 92, 97-118.
  • Williams, P H, Araújo, M B and Rasmont, P (2007) Can vulnerability among British bumblebee (Bombus) species be explained by niche position and breadth? Biological Conservation, 138, 493-505.
  • Williams, P H, and  Osborne, J L (2009) Bumblebee vulnerability and conservation world-wide. Apidologie, 40, 367-387.
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