Steiner, Gábor. “Problems of Legal Interpretation Encountered With the Collection of Secret Information and the Use of the Results of the Application of Covert Devices: – In the Light of Case Law”. Hungarian Law Enforcement 22, no. 1 (May 11, 2022): 79–94. Accessed September 28, 2025. https://folyoirat.ludovika.hu/magyrend/article/view/5567.