
http://www.ips-journal.eu/regions/global/article/show/why-pollsters-normally-get-it-right-more-or-less-2299/

https://eprints.lse.ac.uk/114262/1/RandolphStorper_Is_Urbanization_in_the_Global_South_Fundamentally_DifferentAccepted2021.pdf

https://www.insightcrime.org/wp-content/uploads/2020/04/El-narcotraficante-invisible-tras-las-huellas-de-Memo-Fantasma_InSight-Crime-Marzo-2020.pdf