Sikorski (2011). Dmitri Shostakovich(PDF). Hamburg: Sikorski Musikverlage Hamburg. p. 149. Archived(PDF) from the original on 2 August 2020. Retrieved 12 May 2022.
Sikorski (2011). Dmitri Shostakovich(PDF). Hamburg: Sikorski Musikverlage Hamburg. p. 149. Archived(PDF) from the original on 2 August 2020. Retrieved 12 May 2022.