@misc{indiciae481c42b4fe3b,
  title = {Discrete-time quantum mechanics. III. Spin systems.},
  author = {CM Bender and F Cooper and KA Milton and SS Pinsky and LM Simmons},
  year = {1987},
  doi = {10.1103/physrevd.35.3081},
  url = {https://pubmed.ncbi.nlm.nih.gov/9957552/},
  note = {Source identifier: 9957552}
}