@article{KNPS04,
 author = {Keim, Daniel A. and North, Stephen C. and Panse, Christian and Sips, Mike},
 journal = {Computers & Graphics (CAG)},
 month = {Jun},
 number = {3},
 pages = {327-344},
 publisher = {Elsevier Science},
 title = {Pixel based Visual Mining of Geo-Spatial Data},
 volume = {28},
 year = {2004}
}