TY  - RPRT
TI  - On the functional optimization of a certain class of nonstationary spatial functions
AU  - G. Christakos
AU  - P.N. Paraskevopoulos
PY  - 1987
DO  - 10.1007/bf00941280
UR  - https://pubs.usgs.gov/publication/70014646
ID  - 70014646
ER  -