@misc{indiciae705ac1b7bff1,
  title = {Simple systems that exhibit self-directed replication},
  author = {Reggia, James A. and Armentrout, Steven L. and Chou, Hui-Hsien and Peng, Yun},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930045544},
  note = {Source identifier: 19930045544}
}