@misc{indiciaee37efdbaa98b,
  title = {The problem of goal changes.},
  author = {B Bullough and V Bullough},
  year = {1965},
  doi = {10.1111/j.1744-6198.1965.tb00299.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5173804/},
  note = {Source identifier: 5173804}
}