References for nonstationary covariance models
Damian, Guttorp and Sampson (2003) J.
Gephys. Res. Atmospheres 108(D24)
Art. No. 8778.
Fuentes (2002) Biometrika 89, 197-210.
Higdon, Swall and Kern (1999) Bayesian
Statistics 6, 761-768,
Kim. Mallick and Holmes (2005) J.
Amer. Statist. Assoc. 100,
653-688
Nott and Dunsmuir (2002) Biometrika
89, 819-829
Nychka, Wikle and Royle (2002) Statistical
Modelling 2, 315-332
Schmidt and O’Hagan (2003) J. Royal
Statist. Soc. B 65(3)
743-758