<https://secure.gravatar.com/avatar/1cac940522aa1293488eb390d87a411a?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://onzamarketing.com/5-herramientas-para-crear-contenido-digital/>