@article {shaddick2014case,
	title = {A case study in preferential sampling: Long term monitoring of air pollution in the UK},
	journal = {Spatial Statistics},
	volume = {9},
	year = {2014},
	pages = {51{\textendash}65},
	publisher = {Elsevier},
	author = {Shaddick, Gavin and Zidek, James V}
}
