@misc{indiciae501866b4bf0d,
  title = {Proposed universal standard for specifying schedules.},
  author = {R F Kallman},
  year = {1991},
  doi = {10.1016/0360-3016(91)90309-r},
  url = {https://pubmed.ncbi.nlm.nih.gov/1938546/},
  note = {Source identifier: 1938546}
}