@article {Abreu:1992yq,
	title = {{A Study of $B^0$ - $\bar{B}^0$ mixing using semileptonic decays of $B$ hadrons produced from $Z^0$}},
	journal = {Phys. Lett.},
	volume = {B301},
	year = {1993},
	pages = {145-154},
	doi = {10.1016/0370-2693(93)90736-2},
	author = {Abreu, P. and others}
}
