@misc{indiciaecaf04bd9a13c,
  title = {Exact sampling formulas for multi-type Galton-Watson processes.},
  author = {Peter Olofsson and Chad A Shaw},
  year = {2002},
  doi = {10.1007/s002850200148},
  url = {https://pubmed.ncbi.nlm.nih.gov/12373340/},
  note = {Source identifier: 12373340}
}