@booklet {84, title = {How To Enhance Cloud Architectures To Enable Cross-Federation}, journal = {Cloud Computing (CLOUD), 2010 IEEE 3rd International Conference on}, year = {2010}, month = {10 July}, pages = {337{\textendash}345}, publisher = {IEEE Computer Society}, address = {Washington, DC}, doi = {10.1109/CLOUD.2010.46}, author = {Antonio Celesti and Francesco Tusa and Massimo Villari and Antonio Puliafito} }