@misc{indiciaeee02ef12609c,
  title = {Histochemical studies on lichen planus.},
  author = {G Heyden and T Arwill and H Gisslén},
  year = {1974},
  doi = {10.1016/0030-4220(74)90419-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4129580/},
  note = {Source identifier: 4129580}
}