<http://schema.org/sameAs>
<https://www.youtube.com/channel/UCDRDFSCsBGMf_X2cQWRXseg>
<http://monimega.com/blog/2013/05/30/una-volgare-dimostrazione-di-coerenza-grillo-rodota-robin-hood-e-guglielmo-tell/>