Nedosvitiy Natalja V. «Increase of tourism industry based on innovative approaches to formation in the cluster structure» // 2012. №4 (20) C.105-112
Ostapovich Igor Yu., Nechkin Andrey V., Kozhevnikov Oleg A. «The Current State of Direct Democracy Institutions in Russia: The Concept, Classification, and Development Prospects» // Tomsk State University Journal 2020. №456 C.225-233
