1. Asafiev, B.V. (1971). Musical form as a process. M.: Music
2. Bernagiewicz, R. (2013). Le radici della semiologia gregoriana. De Musica Disserenda, 9(1-2), 27-39.
3. Bonfeld, M.Sh. (1999). Music: Language. Speech. Thinking. Experience of systematic research of musical art. Vologda https://www.booksite.ru/fulltext/bon/fel/bonfeld/01.htm
4. Chernoivanenko, A.D. (2021). Academic musical and instrumental art as a subject of musicological systemology. Odesa: Helvetica.
5. Eco, U. (1999). The island of yesterday. St. Petersburg: Symposium,