TY JOUR TI Polyarchy of knowledge components as a modernization problem of vocational tourism education KW modernization of vocational tourism education KW polyarchy of knowledge components KW integrated educational environment in the field of tourism JO Universities for Tourism and Service Association Bulletin AU Sakharchuk, E.S. AU Chupanov, A.K. AU Abdulatipova, E.A. PY 2017 IS 11 PB Russian State University of Tourism and Service