Update of a publication on the website

[bangerth]

The VoF publication is now available: Computers and Fluids 190 (2019) 217–253. https://doi.org/10.1016/j.compfluid.2019.05.015 We should update the reference in the publications list.

@article{Robey2019,
  doi = {10.1016/j.compfluid.2019.05.015},
  url = {https://doi.org/10.1016/j.compfluid.2019.05.015},
  year = {2019},
  month = aug,
  publisher = {Elsevier {BV}},
  volume = {190},
  pages = {217--253},
  author = {Jonathan M. Robey and Elbridge Gerry Puckett},
  title = {Implementation of a Volume-of-Fluid method in a finite element code with applications to thermochemical convection in a density stratified fluid in the Earth's mantle},
  journal = {Computers {\&} Fluids}
}

[gassmoeller]

Closed by #3301