@misc{indiciaecdc75f6ef238,
  title = {Activity group parameters.},
  author = {C Semonsky and G Zicht},
  year = {1974},
  doi = {10.1016/s0002-7138(09)61339-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4850405/},
  note = {Source identifier: 4850405}
}