Lotman Iu. М. and Uspenskii В. A. The Role of Dual Models in the Dynamics of Russian Culture (up to the End of the Eighteenth Century) // Lotman Iu.M. and Uspenskii B.A. The Semiotics of Russian Culture / Ed. by Ann Shukman // Michigan Slavic Contributions. — Ann Arbor: Department of Slavic Studies, University of Michigan, 1984. - № 11. - P. 5.