Coaffee, Jon, Arnout de Vries, and Katerina Hadjimatheou. “Enhancing Public Security through Use of Social Media”. European Law Enforcement Research Bulletin, no. 18 (February 19, 2019): 11-24. Accessed August 19, 2022. https://bulletin.cepol.europa.eu/index.php/bulletin/article/view/350.