<https://www.internet4things.it/iot-library/che-cosa-il-lef-lean-experience-factory-mckinsey-per-sperimentare-lindustria-4-0-e-per-accelerare-linnovazione/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.internet4things.it/brand/vem-sistemi/>