@article{dualdensityoperatorsandnaturallanguage,
  title = {Dual Density Operators and Natural Language Meaning},
  author = {Daniela Ashoush and Bob Coecke},
  year = {2016},
  eprint = {1608.01401},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1608.01401v1},
}