Contour dynamics with symplectic time integration / P.W.C. Vosbeek, R.M.M. MattheijContour dynamics and applications to 2D vortices / Pauline Wilhelmina Catharina VosbeekAcceleration of contour dynamics simulations with a hierarchical element method / by P.W.C. Vosbeek, H.J.H. Clercx, R.M.M. MattheijManually adjusting a numerical weather analysis in terms of potential vorticity using three-dimensional variational data-assimilation / P.W.C. Vosbeek, W.T.M. Verkley, A.R. Moene