See at:
etd.adm.unipi.it | ISTI Repository
| CNR ExploRA
See at:
ISTI Repository | dl.acm.org
| doi.org
| CNR ExploRA
See at:
arXiv.org e-Print Archive | IEEE Transactions on Knowledge and Data Engineering
| ISTI Repository
| IEEE Transactions on Knowledge and Data Engineering
| doi.org
| ieeexplore.ieee.org
| CNR ExploRA
See at:
arXiv.org e-Print Archive | ZENODO
| ZENODO
| ISTI Repository
| ACM Transactions on Information Systems
| dl.acm.org
| ACM Transactions on Information Systems
| doi.org
| CNR ExploRA