Christensen, Erwin 0. (1944). 'Freud on Leonardo da Vinci.' Psychoanalytic Review, xxxi, 153-164.
2.
Eissler, K.R. (1961). Leonardo da Vinci: Psychoanalytic Notes on the Enigma (New York: International Universities Press).
3.
Freud, Sigmund (1910). 'Leonardo da Vinci and a Memory of his Childhood '. Standard Edition, edited by James Strachey , Vol. XI (London: Hogarth Press, 1957), 63-137.
4.
Freud, Sigmund (1925). 'An Autobiographical Study'. Standard Edition, edited by James Strachey, Vol. XX (London: Hogarth Press, 1959), 7-74.
5.
Freud, Sigmund and C.G. Jung (1974). The Freud/Jung Letters (London : Hogarth Press).
6.
Herzfeld, Marie (1906). Leonardo da Vinci, der Denker, Forscher und Poet: Nach den veroeffentlichten Handschriften. Second edition (Jena: Eugen Diederich).
7.
Jones, Ernest (1955). The Life and Work of Sigmund Freud. Vol. II: Years of Maturity (New York: Basic Books ).
8.
Maclagan, Eric (1923). 'Leonardo in the Consulting Room'. Burlington Magazine, xlii, 54-57.
9.
Merezhkovsky, Dmitry (1903). Leonardo da Vinci: Historischer Roman aus der Wende des 15. Jahrhunderts. Translated by Carl von Gütschow ( Leipzig: Schutze).
10.
Nunberg, Herman and Ernst Federn (eds) (1967). Minutes of the Vienna Psychoanalytic Society. Translated by M. Nunberg. Vol. II: 1908-1910 (New York: International Universities Press ).
11.
Nunberg, Herman and Ernst Federn (eds) (1977). Protokolle der Wiener Psychoanalytischen Vereinigung. Vol. II: 1908-1910 (Frankfurt am Main: S. Fischer).
12.
Pfister, Oskar (1913). 'Kryptolalie, Kryptographie und unbewusstes Vexierbild bei Normalen'. Jahrbuch fur psychoanalytische und psychopathologische Forschungen. Vol. 5, 145-156.
13.
Seidlitz, Woldemar von (1909). Leonardo da Vinci: Der Wendepunkt der Renaissance . Vol. I (Berlin: Julius Bard).
14.
Spector, Jack J. (1972). The Aesthetics of Freud: A Study in Psychoanalysis and Art (London: Allen Lane/The Penguin Press).
15.
Strachey, James (1957). 'Editor's Note: Eine Kindheitserinnerung des Leonardo da Vinci'. In The Standard Edition of the Complete Psychological Works of Sigmund Freud, Vol. XI, 59-62.
16.
Trosman, Harry and Roger Dennis Simmons (1973). 'The Freud Library'. Journal of the American Psychoanalytic Association, xxi, 646-687.