@article {6297,
	title = {A study on natural and manmade global interannual fluctuations of cirrus cloud cover for the period 1984-2004},
	journal = {Atmos. Chem. Phys.},
	volume = {7},
	year = {2007},
	pages = {2631-2642},
	url = {http://www.atmos-chem-phys.net/7/2631/2007/},
	author = {Elefthreratos, K. and Zerefos, C. S. and Zanis, P. and Balis, D. S. and Tselioudis, G. and Gierens, K. and Sausen, R.}
}
