Electrical properties of acupuncture points and meridians: a systematic review.
A.C. Ahn, A.P Colbert, B.J. Anderson, O.G. Martinsen, R. Hammerschlag, S. Cina, P.M. Wayne & H.M. Lange. Bioelectromagnetics. 29: 245–256, 2008

Clinical utility of electrodermal activity at acupuncture points: a narrative review.
A.P. Colbert, K.P. Spaulding, A.C. Ahn & J.A. Cutro. Acupuncture in Medicine. 29: 270–275, 2011.