@misc{indiciaed0f4a77376b7,
  title = {A tetrad test for causal indicators.},
  author = {K A Bollen and K F Ting},
  year = {2000},
  doi = {10.1037/1082-989x.5.1.3},
  url = {https://pubmed.ncbi.nlm.nih.gov/10937320/},
  note = {Source identifier: 10937320}
}