[1] Marx D. B., Thompson K. C.: Practical aspects of agricultural Kriging. Arkansas Agricultural Experiment Station Bulletin 903 (April 1987)
[2] Gallichand J., Prasher S. O., Broughton R. S., Marcotte D.: Kriging of Hydraulic Conductivity for Subsurface Drainage Design. Jurnal of Irrigation and Drainage Engineering 1991, vol. 117, No. 5