@misc{indiciaea46c0fbf903b,
  title = {Phase variation: evolution of a controlling element.},
  author = {M Simon and J Zieg and M Silverman and G Mandel and R Doolittle},
  year = {1980},
  doi = {10.1126/science.6251543},
  url = {https://pubmed.ncbi.nlm.nih.gov/6251543/},
  note = {Source identifier: 6251543}
}