@article {Schmitz1990,
	title = {{Modern kriging and classical gaussian techniques {\textendash} Do they necessarily yield identical results?}},
	journal = {Advances in Water Resources},
	volume = {13},
	number = {2},
	year = {1990},
	pages = {90-97},
	author = {Schmitz, G.~H. and Kiefer, E.-M. and Vauclin, M.}
}