1. Abraham, H. A. (1974). Karl Abraham: An unfinished biography. The International Review of Psycho-Analysis, 1, 17–72
2. Abraham, K. (1902a). On a case of hernianapsia with color blindness (for red-green) with intact field vision. Psychiatrischer Verein, XXVII.
3. Abraham, K. (1902b). A contribution to the understanding of Delirum Tremens of morphine addicts. Zentralblatt fur Nervenheilkunde und Psychiatrie, 25, 369–380.
4. Abraham, K. (March, 1904). On experiments with veronal in states of agitation in general paralysis. Zentralblatt fur Nervenheilkunde und Psychiatrie,
27, 176–180.
5. Abraham, K., & Ziegenhagen (1904). Cytodiagnostic investigations in dementia paralytica. Psychiatrischer Verein, XXVII.