@article {16111,
	title = {Extending the Utility of Treemaps with Flexible Hierarchy (2004)},
	year = {2005},
	month = {2005///},
	abstract = {Treemaps is a visualization technique for presenting hierarchical information on two dimensional displays. Prior implementations limit the visualization to pre-defined static hierarchies. Flexible hierarchy, a new capability of Treemap 4.0, enables users to define various hierarchies through dynamically selecting a series of data attributes so that they can discover patterns, clusters and outliers. This paper describes the design and implementation issues of flexible hierarchy. It then reports on a usability study which led to enhancements to the interface.},
	keywords = {Technical Report},
	url = {http://drum.lib.umd.edu/handle/1903/6514},
	author = {Chintalapani,Gouthami and Plaisant, Catherine and Shneiderman, Ben}
}
