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http://journals.cambridge.org/action/displayAbstract?aid=1806228
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MARIO COPPO,
MARIANGIOLA DEZANI-CIANCAGLINI
and ELIO GIOVANNETTI
(2008).
Types for ambient and process mobility. Mathematical Structures in Computer Science, 18
,
pp 221-290
doi:10.1017/S0960129508006658