@article{heunenkarvonen:daggermonads,
  title={Monads on dagger categories},
  author={Heunen, Chris and Karvonen, Martti},
  journal={Theory and Applications of Categories},
  volume={31},
  number={35},
  pages={1016--1043},
  year={2016},
  doi={10.70930/tac/kvbpoc6x}, 
  url={http://www.tac.mta.ca/tac/volumes/31/35/31-35abs.html},
}