@article{Ip2012Hierarchical,<br/>
&nbsp&nbsp&nbsp&nbsptitle = {{Hierarchical Exploration of Volumes Using Multilevel Segmentation of the Intensity-Gradient Histograms}},<br/>
&nbsp&nbsp&nbsp&nbspauthor = {Cheuk Yiu Ip and Amitabh Varshney and Joseph JaJa},<br/>
&nbsp&nbsp&nbsp&nbspjournal = {IEEE Transactions on Visualization and Computer Graphics},<br/>
&nbsp&nbsp&nbsp&nbspyear = {2012},<br/>
&nbsp&nbsp&nbsp&nbspvolume = {18},<br/>
&nbsp&nbsp&nbsp&nbspnumber = {12},<br/>
&nbsp&nbsp&nbsp&nbspkeywords = {Volume exploration, volume classification, normalized cut, Information-guided exploration},<br/>
&nbsp&nbsp&nbsp&nbsppages = {2355--2363}<br/>
}<br/>