Title: Step by Step: Bulgarian Language and Culture for Foreigners (A1), Author: Radost Sabeva
Title: Step by Step: Bulgarian Language and Culture for Foreigners (A2), Author: Radost Sabeva
Title: Slavica viterbiensia 003: Periodico di letterature e culture slave della Facoltà di Lingue e Letterature Straniere Moderne dell'Università della Tuscia, Author: Aa.Vv.
Title: Remarks on the Phonological Evolution of Russian in Comparison with the Other Slavic Languages, Author: Roman Jakobson
Title: Romani dictionary: Kalderash - English, Author: Ronald Lee