V. A. Vasil’ev
Volgograd Academy of the Ministry of Interior of Russia

Vasil’ev Vasilii Alekseevich – Candidate of Chemistry, Associate Professor of the Department of Traceology and Ballistics of the Training and Scientific Complex of Forensic Expert Activities

Volgograd 400089

T. A. Ermakova
Volgograd State University
Russian Federation

Ermakova Tat’yna Aleksandrovna – Candidate of Chemistry, Associate Professor of the Department of Forensic Expertise and Material Physics

Volgograd 4000062

Yu. A. Druzhinin
Forensic Center of the Ministry of Internal Affairs of the Russian Federation

Druzhinin Yurii Alekseevich – Engineer at the Department of Handwriting Examinations and Technical and Forensic Research of Documents

Moscow 125130

I. B. Afanas’ev
The Russian Federal Centre of Forensic Science of the Ministry of Justice of the Russian Federation

Afanas’ev Il’ya Borisovich – Chief Expert

Moscow 109028

Yu. T. Yudina
Forensic Center of the Ministry of Internal Affairs of the Russian Federation

Yudina Tat’yana Yur’evna – Expert of the Department of Investigations with the Use of Physical Methods

Moscow 125130