<http://www.e-service-online.com/eservice/wp-content/uploads/2016/01/logo_pubblisher.png>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.e-service-online.com/big-data-la-nuova-era-dei-vantaggi-per-le-pmi-e-realta-2/>