@unpublished{TUW-120103, author = {Gartner, Georg and Persson, Donata and Buchroithner, Manfred}, title = {Towards a Typology of Interactivity Functions for Visual Map Exploration}, year = {2005}, note = {talk: 1st International Workshop on Geographic Hypermedia, Denver, USA; 2005-04-04 -- 2005-04-05} }