Vaitl D, Birbaumer N, Gruzelier J, Jamieson GA, Kotchoubey B, Kübler A, Lehmann D, Miltner WH, Ott U, Pütz P, Sammer G, Strauch I, Strehl U, Wackermann J, Weiss T (2005). "Psychobiology of Altered States of Consciousness". Psychological Bulletin. 131 (1): 98–127. doi:10.1037/0033-2909.131.1.98. ISSN1939-1455. PMID15631555. S2CID6909813.
Lehmann D, Grass P, Meier B (1995). "Spontaneous conscious covert cognition states and brain electric spectral states in canonical correlations". International Journal of Psychophysiology. 19 (1): 41–52. doi:10.1016/0167-8760(94)00072-m. PMID7790288.
Rothenberg A (Autumn 1995). "Creative Cognitive Processes in Kekulé's Discovery of the Structure of the Benzene Molecule". The American Journal of Psychology. 108 (3). University of Illinois Press: 419–438. doi:10.2307/1422898. JSTOR1422898.
Rothenberg A (Autumn 1995). "Creative Cognitive Processes in Kekulé's Discovery of the Structure of the Benzene Molecule". The American Journal of Psychology. 108 (3). University of Illinois Press: 419–438. doi:10.2307/1422898. JSTOR1422898.
[1] Edgecomb, Rodney Stenning. "The Oneiric Vision of "Oliver Twist". Dickens Quarterly. Vol. 31, No. 2, June 2014. p. 98-102
Vaitl D, Birbaumer N, Gruzelier J, Jamieson GA, Kotchoubey B, Kübler A, Lehmann D, Miltner WH, Ott U, Pütz P, Sammer G, Strauch I, Strehl U, Wackermann J, Weiss T (2005). "Psychobiology of Altered States of Consciousness". Psychological Bulletin. 131 (1): 98–127. doi:10.1037/0033-2909.131.1.98. ISSN1939-1455. PMID15631555. S2CID6909813.
Lehmann D, Grass P, Meier B (1995). "Spontaneous conscious covert cognition states and brain electric spectral states in canonical correlations". International Journal of Psychophysiology. 19 (1): 41–52. doi:10.1016/0167-8760(94)00072-m. PMID7790288.
Vaitl D, Birbaumer N, Gruzelier J, Jamieson GA, Kotchoubey B, Kübler A, Lehmann D, Miltner WH, Ott U, Pütz P, Sammer G, Strauch I, Strehl U, Wackermann J, Weiss T (2005). "Psychobiology of Altered States of Consciousness". Psychological Bulletin. 131 (1): 98–127. doi:10.1037/0033-2909.131.1.98. ISSN1939-1455. PMID15631555. S2CID6909813.
Vaitl D, Birbaumer N, Gruzelier J, Jamieson GA, Kotchoubey B, Kübler A, Lehmann D, Miltner WH, Ott U, Pütz P, Sammer G, Strauch I, Strehl U, Wackermann J, Weiss T (2005). "Psychobiology of Altered States of Consciousness". Psychological Bulletin. 131 (1): 98–127. doi:10.1037/0033-2909.131.1.98. ISSN1939-1455. PMID15631555. S2CID6909813.