@article {Abreu:1991rm,
	title = {{The reaction e+ e- {\textendash}-> gamma gamma (gamma) at Z0 energies}},
	journal = {Phys. Lett.},
	volume = {B268},
	year = {1991},
	pages = {296-304},
	doi = {10.1016/0370-2693(91)90819-C},
	author = {Abreu, P. and others}
}
