References

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Meinguet, Jean (1979), "Multivariate Interpolation at Arbitrary Points Made Simple," Journal of Applied Mathematics and Physics , 30, 292 “304.

Ripley, B.D. (1981), Spatial Statistics , New York: John Wiley & Sons, Inc.

Wahba, Grace (1979), "How to Smooth Curves and Surfaces with Splines and Cross-validation," in U.S. Army Research Office Report 79 “2, Proceedings of the 24th Conference on the Design of Experiments .