A conceptual model for public health research.

@article{Frenk1988ACM,
  title={A conceptual model for public health research.},
  author={Julio Frenk and Jos{\'e} Luis Bobadilla and J. J. Ochoa Sep{\'u}lveda and J. Gregory Rosenthal and Enrique Gonz{\'a}lez Ruelas},
  journal={Bulletin of the Pan American Health Organization},
  year={1988},
  volume={22 1},
  pages={
          60-71
        }
}