@misc{indiciae694955e3d5fa,
  title = {In memoriam. Ockert Stephanus Heyns.},
  author = {F Daubenton and L G van Dongen},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4586006/},
  note = {Source identifier: 4586006}
}