A comparison of Latin hypercube and grid ensemble designs for the multivariate emulation of an Earth system model. - Nathan M. Urban; Thomas E. Fricker (Comput. Geosci., 2010)

Multivariate Gaussian Process Emulators With Nonseparable Covariance Structures. - Thomas E. Fricker; Jeremy E. Oakley; Nathan M. Urban (Technometrics, 2013)