Elsner, Jens, Thomas Fritz, Laura Henke, Oussama Jarrousse, Stefan Taing, and Mathias Uhlenbrock. “Automatic Weapon Detection in Social Media Image Data Using a Two-Pass Convolutional Neural Network”. European Law Enforcement Research Bulletin, no. 4 SCE (October 26, 2018): 61-65. Accessed March 2, 2024. https://bulletin.cepol.europa.eu/index.php/bulletin/article/view/323.