1. Barakhnin V.B., Kozhemyakinа O.Yu., CEUR Workshop Proceedings, 934 (2012) (in Russian)
2. Lestsova M.A., Bulletin of the Chelyabinsk State Pedagogical University, 4 (2014) (in Russian)
3. Orlov Yu.N., Osminin K.P., Methods of statistical analysis of literary texts (Editorial URSS, Moscow, 2012) (in Russian)
4. Grehnev V.A., Lyrics of Pushkin. About the poetics of genres (Gorkiy, 1985) (in Russian)