Bender, J;    Koschier, D;      (2017)    Divergence-Free SPH for Incompressible and Viscous Fluids.                   IEEE Transactions on Visualization and Computer Graphics , 23  (3)   pp. 1193-1206.    10.1109/TVCG.2016.2578335 <https://doi.org/10.1109/TVCG.2016.2578335>.       Green open access