TY JOUR TI INSTITUTIONAL AND FINANCIAL BARRIERS IN THE USE OF CULTURAL HERITAGE OBJECTS IN THE PENZA REGION KW cultural heritage sites KW institutional barriers KW financial constraints KW confessional space KW agritourism KW Penza Region KW religious tourism KW sustainable development KW tourism potential JO INTERNATIONAL AGRICULTURAL JOURNAL AU Malyshev, A.A. AU Solodkov, N.N. PY 2026 IS 8 PB Electronic science