https://dieunbestechlichen.com/2018/09/prostitution-drogenhandel-unheimlicher-import-aus-afrika-die-grausame-voodoo-mafia-schwarze-axt/
Nigeria: The Black Axe confraternity, also known as the Neo-Black Movement of Africa, including their rituals, oaths of secrecy, and use of symbols or particular signs; whether they use force to recruit individuals (2009-November 2012)
http://www.refworld.org/docid/50ebf7a82.html
https://www.theguardian.com/global-development/2016/aug/07/nigeria-trafficking-women-prostitutes-italy
https://www.thetimes.co.uk/article/black-axe-gang-uses-voodoo-to-snare-migrant-women-in-italy-dtdbvpl0f
https://news.vice.com/en_ca/article/kzgnxy/the-mafia-and-a-nigerian-gang-are-targeting-refugees-in-sicily
https://www.pulse.ng/gist/pop-culture/nigerian-gangs-are-now-moving-into-italian-mafia-territory-id7556173.html
http://newobserveronline.com/black-axe-nigerian-gang-in-italy-as-african-invasion-continues/
https://bazonline.ch/ausland/europa/die-schwarze-axt/story/15199232