Extraction of Terrain Data from Digitised Contours. - M. Maia; Atila Xavier; Hélio Lopes 001; Sinésio Pesco; Geovan Tavares (Int. J. Shape Model., 2001)

Handlebody Representation for Surfaces and Its Applications to Terrain Modeling. - Hélio Lopes 001; Sinésio Pesco; Geovan Tavares; M. Maia; Atila Xavier (Int. J. Shape Model., 2003)