Christopher M. Gold
and Maciej Dakowicz
Advances in Spatial Data Handling: Proc. 10th Int. Symp. Spatial Data Handling (SDH 2002), D. Richardson, ed., Springer-Verlag, 2002
http://www.voronoi.com/pdfs/2000-2003/Terrain_Modelling_Based_on_Contours_and_Slopes.pdf
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