<https://secure.gravatar.com/avatar/9df2f844d109252963035ecaac922ebd?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.neuroeconomix.com/es/estudios-con-datos-de-vida-real/>