13. Randi E., Aksenova A. ZHizel' kak skrytoe voploshchenie esteticheskogo ideala [Giselle as a Hidden Embodiment of the Aesthetic Ideal]. Theatre. Fine arts. Cinema. Music. 2017, no. 3, pp. 96-110. (In Russian)
14. Khodakovsky E. V. Kaspar David Fridrikh i arkhitektura [Caspar David Friedrich and Architecture]. St. Petersburg, 2009. 118 p. (In Russian)
15. Bialostocki J. (1977) Tor und Tod bei Caspar David Friedrich. Caspar David Friedrich. Leben, Werk, Diskussion. Berlin: 155-159. (In German)
16. Bцrsch-Supan H. (1975) Caspar David Friedrich. Mьnchen: Prestel-Verlag: 178. (In German)