@misc{indiciae1698a063aefc,
  title = {Population modeling: a systems approach.},
  author = {G A Coulman and S R Reice and R L Tummala},
  year = {1972},
  doi = {10.1126/science.175.4021.518},
  url = {https://pubmed.ncbi.nlm.nih.gov/5008590/},
  note = {Source identifier: 5008590}
}