P.  Ruhnau, Stahl, A., and Schnörr, C., ?Variational Estimation of Experimental Fluid Flows with Physics-Based Spatio-Temporal Regularization?, Measurement Science and Technology, vol. 18, pp. 755-763, 2007.

P.  Ruhnau, Gütter, C., Putze, T., and Schnörr, C., ?A variational approach for particle tracking velocimetry?, Meas. Science and Techn., vol. 16, pp. 1449-1458, 2005.

P.  Ruhnau, Kohlberger, T., Nobach, H., and Schnörr, C., ?Variational Optical Flow Estimation for Particle Image Velocimetry?, Experiments in Fluids, vol. 38, pp. 21?32, 2005.

P.  Ruhnau, Kohlberger, T., Nobach, H., and Schnörr, C., ?Variational Optical Flow Estimation for Particle Image Velocimetry?, Proc. Lasermethoden in der Strömungsmeßtechnik. Deutsche Gesellschaft für Laser-Anemometrie GALA e.V., Karlsruhe, 2004.