1. Bergler, Edmund: The Basic Neurosis—Oral Regression and Psychic Masochism. P. 76. Grune & Stratton. 1949.
2. Freud, Sigmund: Three Contributions to the Theory of Sex. In: The Basic Writings of Sigmund Freud. P. 598. Modern Library. New York.
3. Ribble, Margaret: The Rights of Infants. Pp. 28–39. Columbia University Press. New York. 1944.
4. Alexander, Franz: The metapsychological description of the process of cure. Int. J. Psychoan., 6:30, 925.
5. Glover, Edward: Notes on oral character formation. Int. J. Psychoan., 6:132, 1925.