@Article{elsner2012multi,
	author = {Elsner, Jens P and Park, Hosung and Mo, Jeonghoon and Jondral, Friedrich K},
	title = {Multi-level orthogonal hopping rendezvous},
	journal = {IEEE Commun. Lett.},
	volume = {16},
	number = {8},
	pages = {1220–1223},
	year = {2012},
}