@misc{indiciaed4c8273de460,
  title = {Evolutionary learning and hierarchical Markov systems.},
  author = {H M Hastings and S Waner and Y R Wu},
  year = {1989},
  doi = {10.1016/0303-2647(89)90020-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/2627563/},
  note = {Source identifier: 2627563}
}