^Peter Howarth, British Poetry in the Age of Modernism, Cambridge University Press, 2005, p. 163.
^Beiser, Frederick C., Weltschmerz: Pessimism in German Philosophy, 1860-1900, Oxford: Oxford University Press, 2016, p. 147.
^Beiser, Frederick C., Weltschmerz: Pessimism in German Philosophy, 1860-1900, Oxford: Oxford University Press, 2016, p. 129.
^Jung, C. G. ([1959] 1969). The Archetypes and the Collective Unconscious, Collected Works, Volume 9, Part 1, Princeton, N.J.: Princeton University Press. ISBN0-691-01833-2, par. 259: "Although various philosophers, among them Leibniz, Kant, and Schelling, had already pointed very clearly to the problem of the dark side of the psyche, it was a physician who felt impelled, from his scientific and medical experience, to point to the unconscious as the essential basis of the psyche. This was C. G. Carus, the authority whom Eduard von Hartmann followed."