L.-C. Lo, C.-Y. Chen, J. Y. Chiang, T.-L. Cheng, H.-J. Lin, and H.-H. Chang, “TONGUE DIAGNOSIS OF TRADITIONAL CHINESE MEDICINE FOR RHEUMATOID ARTHRITIS”, Afr J Tradit Complement Altern Med, vol. 10, no. 5, pp. 360–369, Jul. 2013.