@Incollection{RíosViqueira04,
author = {Viqueira, J. R. and Lorentzos, N. A. and Brisaboa, N. R.},
title = {Survey on Spatial Data Modelling Approaches},
booktitle = {Spatial Databases: Technologies, Techniques and Trends},
publisher = {Idea Group Publishing},
address = {Hershey, PA},
year = {2004},
pages = {1-22}
}