A. Frank, and R. Barrera. Design and Implementation of Large Spatial Databases, volume 409 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (1989)
M. Hampe, M. Sester, and L. Harrie. ISPRS Congrese, volume XXXV of International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, page 135-140. Lund University, Dept of Physical Geography and Ecosystem Science, (2004)
S. Sun, S. Prasher, and X. Zhou. Conceptual Modeling for Advanced Application Domains, volume 3289 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2004)
D. Maguire, M. Goodchild, and D. Rhind (Eds.) Longman Scientific and Technical, Longman Group UK Ltd, Longman House, Burnt Mill, Harlow, Essex CM20 2JE, England, (1991)