@article {Abreu:1998yx,
	title = {{The Estimation of the effective center-of-mass energy in q anti-q gamma events from DELPHI}},
	journal = {Nucl. Instrum. Meth.},
	volume = {A427},
	year = {1999},
	pages = {487-494},
	doi = {10.1016/S0168-9002(98)01394-1},
	author = {Abreu, P. and De Angelis, A. and Della Ricca, G. and Fassouliotis, D. and Grefrath, A. and Kjaer, N. and Henriques, R. P. and Mulders, M. and Pimenta, M. and Vitale, L.}
}
