@article {aggelis2013mapping,
	title = {Mapping of surface ozone seasonality and trends across Europe during 1997{\textendash}2006 through kriging interpolation to observational data},
	journal = {Water, Air, \& Soil Pollution},
	volume = {224},
	number = {4},
	year = {2013},
	pages = {1{\textendash}19},
	publisher = {Springer},
	author = {Aggelis, D. and Zanis, P. and Zerefos, C. S. and Bais, A. F. and Nastos, P. T.}
}
