http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32014L0065&from=EN
https://capx.co/happy-300th-birthday-to-adam-smith-his-work-is-more-relevant-than-ever/
https://www.boe.es/buscar/pdf/2023/BOE-A-2023-4513-consolidado.pdf
https://ecfsapi.fcc.gov/file/109303096909269/Sage%20&%20Carpenter,%202009.pdf