@article{KKN99a,
 author = {Koutsofios, Eleftherios and Keim, Daniel A. and North, Stephen C.},
 journal = {IEEE Computer Graphics & Applications Journal},
 month = {May},
 number = {3},
 pages = {16--19},
 title = {Visualizing Large Telecommunication Data Sets},
 volume = {19},
 year = {1999}
}