@misc{indiciae7e41338cb93f,
  title = {Oppositional behavior in children.},
  author = {E R Christophersen},
  year = {1991},
  doi = {10.3928/0090-4481-19910501-10},
  url = {https://pubmed.ncbi.nlm.nih.gov/1896229/},
  note = {Source identifier: 1896229}
}