For citations:

Gutova S.G. The Essence of Religion in the Concepts of N.Ya. Danilevsky, O. Spengler and A. Toynbee: Methodological Foundations. Observatory of Culture. 2017;14(5):613-621. (In Russ.) https://doi.org/10.25281/2072-3156-2017-14-5-613-621