@misc{indiciae7bc0258644a1,
  title = {A note on soft and hard qualities.},
  author = {M Eigen},
  year = {1980},
  doi = {10.1007/bf01252210},
  url = {https://pubmed.ncbi.nlm.nih.gov/7235090/},
  note = {Source identifier: 7235090}
}