@article{Hughes2016</br>
  title={Mixing eciency in run-down gravity currents}</br>
  author={Hughes</br> G. O. and Linden</br> P. F.}</br>
  journal={J. Fluid Mech.}</br>
  volume={809}</br>
  pages={691-704}</br>
  year={2016}</br>
  publisher={Cambridge University Press}</br>
  URL = {https://doi.org/10.1017/jfm.2016.696}
}