@article {Aad:2019tcc,
	title = {{Search for displaced vertices of oppositely charged leptons from decays of long-lived particles in $pp$ collisions at $\sqrt {s}$ =13 TeV with the ATLAS detector}},
	journal = {Phys. Lett. B},
	volume = {801},
	year = {2020},
	pages = {135114},
	doi = {10.1016/j.physletb.2019.135114},
	author = {Aad, Georges and others}
}
