Bayerl, P., Akhgar, B., Raven, A., Gibson, H. and Day, T. (2022) “Future Challenges and Requirements for Open Source Intelligence”, European Law Enforcement Research Bulletin, 22, pp. 21-38. Available at: http://bulletin.cepol.europa.eu/index.php/bulletin/article/view/526 (Accessed: 21May2024).