Cohn, Cindy; Gebhart, Gennie (February 14, 2018). "The Revolution and Slack". Electronic Frontier Foundation. Archived from the original on September 4, 2018. Retrieved October 13, 2018.
Cohn, Cindy; Gebhart, Gennie (February 14, 2018). "The Revolution and Slack". Electronic Frontier Foundation. Archived from the original on September 4, 2018. Retrieved October 13, 2018.