@misc{indiciaef1fec8b0e9c1,
  title = {Gray-scale photolithography using microfluidic photomasks.},
  author = {Chihchen Chen and Danny Hirdes and Albert Folch},
  year = {2003},
  doi = {10.1073/pnas.0435755100},
  url = {https://pubmed.ncbi.nlm.nih.gov/12574512/},
  note = {Source identifier: 12574512}
}