@article{prochaska1997,
  title={The Transtheoretical Model of Health Behavior Change},
  author={James O. Prochaska and Wayne F. Velicer},
  year={1997},
  journal={American Journal of Health Promotion},
  doi={10.4278/0890-1171-12.1.38},
  url={https://doi.org/10.4278/0890-1171-12.1.38}
}