@inbook { TS:2003, title = {Topology Simplification of Symmetric, Second-Order 2D Tensor Fields}, booktitle = {Geometric Modeling Methods in Scientific Visualization}, year = {2003}, pages = {171-184}, publisher = {Springer}, organization = {Springer}, address = {Berlin, Germany}, author = {Tricoche, X. and Gerik Scheuermann}, editor = {Bernd Hamann and M{\"u}ller, H. and Hans Hagen} }