http://www.telegraph.co.uk/news/2017/05/23/66m-migrants-waiting-cross-europe-africa-report/
https://es.insightcrime.org/noticias/analisis/gamechangers-2018-crimen-ideologia/
http://uk.reuters.com/article/us-britain-eu-negotiations-idUKKBN17R1XJ
https://progressivepost.eu/wp-content/uploads/ProgressivePost15.pdf