@misc{indiciaed58f66534f9b,
  title = {Counting genealogical trees.},
  author = {R C Griffiths},
  year = {1987},
  doi = {10.1007/bf00277166},
  url = {https://pubmed.ncbi.nlm.nih.gov/3668397/},
  note = {Source identifier: 3668397}
}