@article {Abdallah:2007fk,
	title = {{Study of multi-muon bundles in cosmic ray showers detected with the DELPHI detector at LEP}},
	journal = {Astropart. Phys.},
	volume = {28},
	year = {2007},
	pages = {273-286},
	doi = {10.1016/j.astropartphys.2007.06.001},
	author = {Abdallah, J. and others}
}
