@misc{indiciae01242f6b8cb7,
  title = {[Triphasic versus monophasic p-pill. A comparative multicenter study].},
  author = {T Engebretsen and E Thorsen and C C Smith and T Bull-Njaa and A Christensen},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/3299858/},
  note = {Source identifier: 3299858}
}