@misc{indiciaed4984669c54a,
  title = {Dynamic changes in reinforcer effectiveness: theoretical, methodological, and practical implications for applied research.},
  author = {Eric S Murphy and Frances K McSweeney and Richard G Smith and Jennifer J McComas},
  year = {2003},
  doi = {10.1901/jaba.2003.36-421},
  url = {https://pubmed.ncbi.nlm.nih.gov/14768663/},
  note = {Source identifier: 14768663}
}