Carbon monoxide and carbon dioxide euthanasia of cats: duration and animal behaviour.

@article{Simonsen1981CarbonMA,
  title={Carbon monoxide and carbon dioxide euthanasia of cats: duration and animal behaviour.},
  author={Hertzum Simonsen and A Thordal-Christensen and N Ockens},
  journal={The British veterinary journal},
  year={1981},
  volume={137 3},
  pages={274-8}
}