@article {le2001spatial,
	title = {Spatial prediction and temporal backcasting for environmental fields having monotone data patterns},
	journal = {Canadian Journal of Statistics},
	volume = {29},
	number = {4},
	year = {2001},
	pages = {529{\textendash}554},
	publisher = {Wiley Online Library},
	author = {Le, Nhu and Sun, Li and Zidek, James V}
}
