@article{densitymatricesforderivationalambiguity,
  title = {Density Matrices with Metric for Derivational Ambiguity},
  author = {Adriana D. Correia and Michael Moortgat and Henk T. C. Stoof},
  year = {2019},
  eprint = {1908.07347},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1908.07347v3},
}