@misc{indiciaebbe6c67fbf3b,
  title = {ON THE ABSOLUTE STABILITY OF SAMPLED-DATA CONTROL SYSTEMS.},
  author = {G P Szegö},
  year = {1963},
  doi = {10.1073/pnas.50.3.558},
  url = {https://pubmed.ncbi.nlm.nih.gov/16578547/},
  note = {Source identifier: 16578547}
}