F. Khabiri, W. P. Mei, R. Hagens, V. Schreiner, H. Wenck, K. – P. Wittern, H. – J. Duchstein:
Detection of oxidative processes and the effectiveness of antioxidants (Vitamin C) in/on the skin using UVA-induced UPE measurement techniques (Proceedings Meeting ICBS/ISSI Hamburg May 2003).

M. Rohr, S. Benard, A. Schrader:
UVA-protection and chemiluminescence: new in vivo approach to quantification (ICL-S in comparison with PPD), 22nd IFSCC Congress, Edinburgh, 2002.

S. Benard, M. Rohr, A. Schrader:
Biophotonics – a new field in efficacy testing. UV-protection of skin and hair monitored by ICL-S and ICL-H. SÖWF-Journal, Volume 6 (2002), p 40-45.

Benard, Nerenz, Rohr, Schrader (Institute Dr. Schrader – Creachem GmbH, Holzminden, Germany):
ICL-H (Induced Chemiluminescence of Human Hair). A new method for quantitative analysis of hair-stress. 2001.

Rohr, Benard, Schrader (Institute Dr. Schrader – Creachem GmbH, Holzminden, Germany):
Enzymes-powerful anti-aging and anti-oxidant active ingredients investigated by FOITS and detection of ICL-S (Proceedings 21 st IFSCC Congress 2000, Berlin).

W. P. Mei, R. Hagens, I. Vogel:
Investigation of oxidative stress on human skin in vivo using ultraweak photon emission detecting technique. 8 th Congress of European Society for Photobiology, Granada, Spain, 3-8 September 1999 (Abstract, p 110).

G. Sauermann, W. P. Mei, U. Hoppe, F. Stäb:
Ultraweak Photon Emission of Human Skin in vivo – Influence of topically applied antioxidants on human skins. Oxidants & Antioxidants, Part B, Methods in Enzymology, Volume 300 (1999), p 419-428.

W. P. Mei, D. Salter, G. Sauermann, U. Hoppe:
A New Measurement Procedure to Assess Skin Stimulation by Rubbing. 20 th Congress of the IFSCC, 14-18 September 1998, Cannes, France.

W. P. Mei, D. Salter, G. Sauermann, U. Hoppe (1996):
Indication of a „Blue Light Effect“ in Human Skin in vivo. 12 th International Congresson Photobiology, Vienna, Austria, September 1-6, 1996.

F. Stäb, R. Keyhani, J. Hansen, G. Sauermann, H. Steinhart, W. P. Mei, U. Hoppe (1996):
In vivo and ex vivo methods for the quantitative evaluation of the antioxidant status of human skin. 2nd International Conference on Clinical Chemiluminescence, Berlin, Germany (Abstract) P-20A.

W. P. Mei, D. Salter, G. Sauermann, U. Hoppe (1996):
Ultraweak Photon Emission (UPE)- A New in vivo Method for Skin Research. 2nd International Conference on Clinical Chemiluminescence, Berlin, Germany (Abstract) P-19A.

H. J. Niggli:
Artificial sunlight irradiation induces ultraweak photon emission in human skin fibroblasts. J.Photochem. Photobiol. B., 18 (1993), p 281-285.

K. Gunther:
Biochemistry of cellular radiation reactions. An indication for ongoing protective mechanisms against oxidative cell damage. Naturwissenschaften,77 (1990), p 412-420.