1. Buzov G A 2005 Protection against information leakage through technical channels: the manual (Moscow: Hotline-Telecom) p 416
2. 2002 Collection of temporary methods for assessing the security of confidential information from leakage through technical channels (Moscow: State Technical Commission Of Russia)
3. Russian Federation Standard GOST R 51275-2006
4. Durakovsky A P 2015 Control of speech information security in premises Certification tests of auxiliary technical means and systems for information security requirements: Tutorial (Moscow: National Research Nuclear University MEPhI) p 152