@article{Sakharchuk2017polyarchy,
author={Sakharchuk, E.S. and Chupanov, A.K. and Abdulatipova, E.A.},
title={Polyarchy of knowledge components as a modernization problem of vocational tourism education},
journal={Universities for Tourism and Service Association Bulletin},
publisher={Russian State University of Tourism and Service},
year={2017},
pages={13-25},
volume={11},
issue={3},
}