@InCollection {dis-policy20,
    author = {S. {De Capitani di Vimercati} and S. Foresti and P.
Samarati},
    editor = {J. Vacca},
    booktitle = {Cloud Computing Security: Foundations and Challenges, 2nd Edition},
    title = {Specification and Enforcement of Access Policies in Emerging Scenarios},
    publisher = {CRC Press},
    year = {2020},
    note = {to appear}
}