@article {Abreu:1994rq,
	title = {{Measurement of the $B^0$ - $\bar{B}^0$ mixing parameter in DELPHI}},
	journal = {Phys. Lett.},
	volume = {B332},
	year = {1994},
	pages = {488-500},
	doi = {10.1016/0370-2693(94)91285-8},
	author = {Abreu, P. and others}
}
