https://theconversation.com/quien-puede-frenar-el-horror-de-gaza-una-mirada-a-los-actores-del-conflicto-215629
https://ukandeu.ac.uk/why-david-cameron-called-the-2016-referendum/?mc_cid=dcb6ed542c&mc_eid=815b1928ec
https://repository.uneca.org/ds2/stream/?#/documents/c4d5119f-1374-435d-900a-4e6e683a1b41/page/1