@article{WeinkaufSahnerTheiseletal.2007, author = {Tino Weinkauf and Jan Sahner and Holger Theisel and Hans-Christian Hege}, title = {Cores of Swirling Particle Motion in Unsteady Flows}, journal = {IEEE Transactions on Visualization and Computer Graphics (Proceedings Visualization 2007)}, volume = {13}, number = {6}, pages = {1759 -- 1766}, doi = {10.1109/TVCG.2007.70545}, year = {2007}, }