https://www.futura-sciences.com/sciences/questions-reponses/histoire-travail-enfants-xixe-siecle-14087/
https://www.geo.fr/histoire/histoire-squelettes-mutiles-revelent-cruaute-exploitation-enfants-xixe-siecle-revolution-industrielle
https://theconversation.com/du-xix-siecle-a-aujourdhui-des-enfants-dans-lenfer-de-la-mine-109487