https://theconversation.com/el-lobby-bajo-la-lupa-es-una-actividad-democratica-221947
https://www.brookings.edu/articles/are-convention-delegates-bound-to-their-presidential-candidate/
https://www.project-syndicate.org/commentary/biden-must-replace-liberal-international-order-by-joseph-s-nye-2020-07
https://www.ips-journal.eu/index.php?id=326&L=0&tx_news_pi1%5Bnews%5D=3904&tx_news_pi1%5Bcontroller%5D=News&tx_news_pi1%5Baction%5D=detail&utm_source=newsletter&utm_medium=email&utm_campaign=en_728_20191129&cHash=5d8677e040088390be92d9eb2a20fb32