@article{mander1988,
  title={Theoretical Stress‐Strain Model for Confined Concrete},
  author={J.B. Mander and M. J. N. Priestley and R. Park},
  year={1988},
  journal={Journal of Structural Engineering},
  doi={10.1061/(asce)0733-9445(1988)114:8(1804)},
  url={https://doi.org/10.1061/(asce)0733-9445(1988)114:8(1804)}
}