Hemsley, Jeff, Jennifer Stromer-Galley, Patrícia Rossini, and Alexander Smith. “STAYING IN THEIR LANES: ISSUE OWNERSHIP IN THE 2016 AND 2020 U.S. PRESIDENTIAL CAMPAIGNS ON FACEBOOK AND TWITTER”. AoIR Selected Papers of Internet Research 2021 (September 15, 2021). Accessed December 3, 2021. https://journals.uic.edu/ojs/index.php/spir/article/view/12182.