1. Abdul-Razzak, Nour, Carlo Prato y Stephane Wolton, “After Citizens United: How outside spending shapes american democracy, en Electoral Studies 67 (2020), pp. 7-75. DOI: http://dx.doi.org/10.2139/ssrn.2823778
2. Alfaro, Mariana y Joanie Greve, “The Koch network is reorganizing under a new name and with new priorities”, The Washington Post, 20 de mayo de 2019, en https://www.washingtonpost.com/news/powerpost/paloma/daily-202/2019/05/20/daily-202-the-koch-network-is-reorganizing-under-a-new-name-and-with-new-priorities/5ce1a94fa7a0a435cff8c0d3/, fecha de consulta: 24 de marzo de 2021.
3. Allison, Bill, “‘Dark Money’ helped paved Joe Biden’s path to the White House”, Bloomberg, 23 de enero de 2021, en https://www.bloomberg.com/news/articles/2021-01-23/-dark-money-helped-pave-joe-biden-s-path-to-the-white-house?utm_campaign=wp_the_daily_202&utm_medium=email&utm_source=newsletter&wpisrc=nl_daily202, fecha de consulta: 29 de abril de 2021.
4. Berman, Russell, “The blue states that make it hardest to vote”, The Atlantic, 15 de abril de 2021, en https://www.theatlantic.com/politics/archive/2021/04/democrats-voting-rights-contradiction/618599/?utm_term=2021-04-15T10%3A00%3A57&utm_campaign=the-atlantic&utm_source=twitter&utm_medium=social&utm_content=edit-promo, fecha de consulta: 20 de abril de 2021.
5. Brownstein, Ronald, “The GOP cheat code to winning back the House”, The Atlantic, 11 de febrero de 2021, en https://www.theatlantic.com/politics/archive/2021/02/democrats-needhr-1-and-new-vra-protect-party/617987/, fecha de consulta: 30 de abril de 2021.