https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/1791/1791.pdf
https://www.socialeurope.eu/wp-content/uploads/2020/04/socialtrust.pdf
https://reader.chathamhouse.org/europes-political-tribes#
https://insightcrime.org/es/noticias/pandillas-narcos-vertice-males-tapachula-mexico/