@misc{indiciae8c3739429380,
  title = {Passive Total Systems with Constant Coefficients.},
  author = {R T Herbst},
  year = {1951},
  doi = {10.1073/pnas.37.10.710},
  url = {https://pubmed.ncbi.nlm.nih.gov/16578407/},
  note = {Source identifier: 16578407}
}