At the origin, kriging is a statistical technique proposed in 1951 by Krige  for natural resource evaluation. Later, Matheron [l] established the mathematical foundation of the method. As presented in the mathematical framework of geostatistics, kriging is simply the best linear unbiased estimator of a random function. Dual kriging was later formulated by Matheron  together with the equivalence with spline interpolation.
- G. Matheron, The intrinsic random functions and their applications. Adv. Appf, Prob.5 , 439-468(1 973).
- D. G. Krige, A statistical approach to some basic mine valuation problems on the Witwatersrand. J. Chem. Metal. M’in. Sot. S. Afr. S2, 119-139 (1951).
- G. Matheron, Splines et Krigeage: leur equivalence formelle, Rapport N-667. Centre de Gtostatistique, Fontainebleau, Ecole des Mines de Paris (1980).