@article{TUW-206135, author = {Templ, Matthias}, title = {Correlation Between Indicators Over Time in Thematic Maps}, journal = {Austrian Journal of Statistics}, year = {2012}, volume = {41}, number = {1}, pages = {67--79}, url = {http://www.stat.tugraz.at/AJS/ausg121/121Templ.pdf}, keywords = {Indicators, Prewhitening, Visualisation, Thematic Maps} }