
https://theconversation.com/quien-puede-convertirse-en-ciudadano-espanol-vericuetos-legales-para-obtener-la-nacionalidad-223771

https://www.equalityhumanrights.com/sites/default/files/investigation-into-antisemitism-in-the-labour-party.pdf

https://www.brookings.edu/wp-content/uploads/2017/09/3_benediktsdottiretal.pdf