<https://www.cartonionline.com/wordpress/la-serie-marvel-what-if-e-se-thor-fosse-figlio-unico/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.cartonionline.com/en/wordpress/the-marvel-series-what-if-and-if-thor-was-an-only-child/>