@misc{indiciae83889c611cc2,
  title = {Two-stage sampling in pharmaceutical applications.},
  author = {J Shao and S C Chow},
  year = {1993},
  doi = {10.1002/sim.4780122104},
  url = {https://pubmed.ncbi.nlm.nih.gov/8296110/},
  note = {Source identifier: 8296110}
}