1. Evaluation user requirements for a digital library testbed;Buttenfield,1995
2. Proactive graphics for exploratory visualization of biogeographical data;Buttenfield;Cartographic Perspectives,1994
3. HyperGeo: a geographical hypermedia system;Caporal,1995
4. Introduction to integrated geoinformation management;Cassettari,1993
5. Hypermedia techniques and spatial relationships in hypergeo dynamic map applications;Dbouk,1996