Yuriko Takeshima Shigeo Takahashi Issei Fujishiro Gregory M. Nielson Introducing Topological Attributes for Objective-Based Visualization. 6 2004 conf/visualization/2004 IEEE Visualization http://csdl.computer.org/comp/proceedings/vis/2004/8788/00/87880006p.pdf db/conf/visualization/visualization2004.html#TakeshimaTFN04