@booklet {76,
	title = {How Clever-based Clouds Conceive Horizontal And Vertical Federations},
	journal = {Computers and Communications (ISCC), 2011 IEEE Symposium on},
	year = {2011},
	pages = {167{\textendash}172},
	publisher = {IEEE Computer Society},
	address = {Los Alamitos, CA},
	author = {Francesco Tusa and Antonio Celesti and Maurizio Paone and Massimo Villari and Antonio Puliafito}
}
