Материалы по теме
|Preobrazhensky, Herman Mikhailovich (philosopher). The meaning of communism. St. Petersburg: Aleteya, 2011.|
Pervolph. Joseph Iosifovich. 1841-1891. Slavs, their mutual relations and connections. Warsaw: Type. K. Kovalevsky, 1886-1893.
T. 3: Slavic idea in the political and cultural relations of the Slavs until the end of the XVIII century. 1890.