↑ 2.02.1Joseph N. Straus (2005), Introduction to Post-Tonal Theory (ed. 3a), p. 152.
↑Wilfred Mellers, "1930: Symphony of Psalms," Tempo, series nova, 97(1971) ("Igor Stravinsky 17 June 1882-6 April 1971"), pp. 19–27. Cambridge University Press.
↑Arthur Berger, "Problems of Pitch Organization in Stravinsky", p. 33, in Perspectives of New Music, Vol. 2, No. 1 (1963):11–42.