@article {Aad:2015cda,
	title = {{Determination of the ratio of $b$-quark fragmentation fractions $f_s/f_d$ in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector}},
	journal = {Phys. Rev. Lett.},
	volume = {115},
	number = {26},
	year = {2015},
	pages = {262001},
	doi = {10.1103/PhysRevLett.115.262001},
	author = {Aad, Georges and others}
}
