For citations:

Protopopova I. “Doubles” and opposites: from archaics to dialectics (O.M. Freidenberg and Plato). RSUH/RGGU Bulletin: “Literary Teory. Linguistics. Cultural Studies”, Series. 2018;(3-1):56-70. (In Russ.) https://doi.org/10.28995/2073-6355-2018-3-56-70