@misc{indiciaecb719929035d,
  title = {Surfactant 1981.},
  author = {J M Gupta},
  year = {1981},
  doi = {10.5694/j.1326-5377.1981.tb135828.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6894778/},
  note = {Source identifier: 6894778}
}