Russia

Saratov State Technical University named after Gagarin Yu. A.

NSTU named after R. E. Alekseev

Saratov State University

Saratov State University

Siberian State Institute of Arts named after Dmitry Hvorostovsky

Krasnoyarsk State Pedagogical University named after V. P. Astafyev

Crimean Federal University named after V.I. Vernadsky

Saratov State University

Ural Institute of Management RANEPA under the President of the Russian Federation

Nizhny Novgorod State University. N.I. Lobachevsky