@misc{indiciae021a73c51922,
  title = {Studies on human intestinal immunoglobulin A.},
  author = {D M Bull and J Bienenstock and T B Tomasi},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/4101802/},
  note = {Source identifier: 4101802}
}