@article {Kyriakidis1999IJGIS,
	title = {{Geostatistics for conflation and accuracy assessment of Digital Elevation Models}},
	journal = {International Journal of Geographical Information Science},
	volume = {13},
	number = {7},
	year = {1999},
	pages = {677-708},
	author = {Kyriakidis, P.~C. and Shortridge, A.~M. and Goodchild, M.~F.}
}