https://www.auswaertiges-amt.de/blob/2405080/23e76da338f1a1c06b1306c8f5f74615/201013-nap-monitoring-abschlussbericht-data.pdf
https://www.socialeurope.eu/the-left-and-freedom
https://theconversation.com/como-lograr-textos-administrativos-y-juridicos-que-se-entiendan-facilmente-216295