1. LuHC (1978) A Complete Translation of the Yellow Emperor's Classic of Internal Medicine and the Difficult Classic (vol.1). Academy of Oriental Heritage, Vancouver, British Columbia: 14–7, 94–100
2. XinnongC (1987) Chinese Acupuncture and Moxibustion. Foreign Languages Press, Beijing: 46–52
3. UnschuldPU (1986) Medicine in China: A History of Ideas. University of California Press, Berkeley: 67–73