@misc{indiciae1e181633816e,
  title = {Further increase in ultraviolet B.},
  author = {W Ambach and M Blumthaler},
  year = {1991},
  doi = {10.1016/0140-6736(91)90536-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1677737/},
  note = {Source identifier: 1677737}
}