IEEEthe Department DIMES University of Calabria Via P.Bucci 87036 Rende(CS) Italy;
the Department DMI University of Catania Viale Andrea Doria 6 95126 Catania(CT) Italy;
the Department DIIES University Mediterranea Loc.Feo di Vito 89122 Reggio Cal.(RC) Italy;
the Department DICEAM University Mediterranea Loc.Feo di Vito 89122 Reggio Cal.(RC) Italy;
Group formation; internet of things(IoT); multiagent system; reputation;