<https://secure.gravatar.com/avatar/73d4bc0649fd0c1425790cb53e3da4eb?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.fccn.pt/blog/eduvpn-acesso-remoto-seguro-para-funcionarios-e-alunos/>