@misc{indiciae4db98456c0e6,
  title = {Flexible regression models with cubic splines.},
  author = {S Durrleman and R Simon},
  year = {1989},
  doi = {10.1002/sim.4780080504},
  url = {https://pubmed.ncbi.nlm.nih.gov/2657958/},
  note = {Source identifier: 2657958}
}