https://www.nber.org/system/files/chapters/c14574/c14574.pdf
https://www.ceps.eu/system/files/CEPS%20-%20LINKEDIN%20study%20FINAL.pdf
https://www.science.org/content/article/berlin-new-who-center-aims-keep-eye-emerging-diseases?utm_campaign=news_daily_2021-09-03&et_rid=682362580&et_cid=3907778
https://theconversation.com/las-matematicas-de-las-votaciones-electronicas-210065