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Kris, E., Greenacre, P., Freud, A., Hartmann, H., Lewin, B. D., Escalona, S., Loewenstein, R. M., Jacobson, E., Spitz, R. A., Waelder, R., Davison, C., Bell, A., Mittelmann, B., Mahler, M. S. & Bychowski, G. (1954) Problems of Infantile Neurosis—A Discussion. Psychoanalytic Study of the Child 9:16-71