@misc{indiciae56a15f9aacc2,
  title = {A computer program for maximum likelihood estimation of survival probabilities under a logistic model.},
  author = {S Johansen},
  year = {1973},
  doi = {10.1016/0010-468x(73)90019-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4748879/},
  note = {Source identifier: 4748879}
}