1. Lipetsk State Technical University,Sociology department,Lipetsk,Russian Federation
2. School of Caucasus Hospitality, Pyatigorsk Institute (branch) North-Caucasus Federal University,Department of Food Technology and Commodity Science,Pyatigorsk,Russian Federation
3. Lipetsk State Technical University,Department of Construction Materials Science and Road Technologies,Lipetsk,Russian Federation
4. Pyatigorsk Medical and Pharmaceutical Institute (branch) VolGMU,Pyatigorsk,Russian Federation