@article { TWS*:2002,
	title = {Topology Tracking for the Visualization of Time-Dependent Two-Dimensional Flows},
	journal = {Computers and Graphics},
	volume = {26},
	year = {2002},
	pages = {249-252},
	author = {Tricoche, X. and Wischgoll, T. and Gerik Scheuermann and Hans Hagen}
}
