@article{gupta2009,
  title={Decomposition of the mean squared error and NSE performance criteria: Implications for improving hydrological modelling},
  author={Hoshin V. Gupta and Harald Kling and Koray K. Yılmaz and Guillermo F. Martinez},
  year={2009},
  journal={Journal of Hydrology},
  doi={10.1016/j.jhydrol.2009.08.003},
  url={https://doi.org/10.1016/j.jhydrol.2009.08.003}
}