Rachel Alexander, " Astroturf 'Outrage Machine' of Trolls on Social Media to Contrast Negative News About Hillary Clinton," The Stream, October 9, 2017.
[37] Rachel Alexander, " Astroturf 'Outrage Machine" di Troll a pagamento, inonda i social media per contrastare le notizie negative su Hillary Clinton ", The Stream, 9 ottobre 2017..