@misc{indiciaebdacbe1dbac2,
  title = {X and y operators for general linear transport processes.},
  author = {J Casti},
  year = {1975},
  doi = {10.1073/pnas.72.3.1210},
  url = {https://pubmed.ncbi.nlm.nih.gov/16592230/},
  note = {Source identifier: 16592230}
}