Minnebo, Paul, and Jelte Verhoeff. “Barking up the Right Tree - How to Identify Learning Points in Criminal Investigations Using a Methodology Based Upon a Fifty‐Year Old Diagramming Technique”. European Law Enforcement Research Bulletin, no. 7 (June 1, 2012): 35-40. Accessed May 6, 2024. http://bulletin.cepol.europa.eu/index.php/bulletin/article/view/62.