<https://secure.gravatar.com/avatar/d204a245dc1d94e86a1035690c0acbd2?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.leonardoleone.it/th-le-10-abitudini-delle-menti-milionarie/>