1. Birbaumer, N., Elbert, T., Rockstroh, B., Lutzenberger, W. (1987). Biofeedback of event-related slow potentials of the brain. International Journal of Psychology, 16, 389–415.
2. Birbaumer, N., Elbert, T., Canavan, A., Rockstroh, B. (1990). Slow potentials of the cerebral cortex and behavior. Physiological Reviews, 70, 1–41.
3. Braitenberg, V. (1978). Cell assemblies in the cerebral cortex. In R. Heim and G. Palm (Eds.), Theoretical Approach to Complex Systems (pp. 171–188). Berlin/Heidelberg: Springer.
4. Bülow, I., Elbert, T., Rockstroh, B., Lutzenberger, W., Canavan, A., Birbaumer, N. (1989). Effects of hyperventilation on EEG-frequency and slow cortical potentials in relation to an anticonvulsant and epilepsy. Journal of Psychophysiology, 3, 147–154.
5. Caspers, H., Speckmann, E.J., Lehmenkuehler, A. (1984) Electrogenesis of slow potentials of the brain. In T. Elbert, B. Rockstroh, W. Lutzenberger, N. Birbaumer (Eds.), Self-Regulation of the Brain and Behavior (pp. 25–41). Berlin/Heidelberg: Springer.