"Boxing". Encyclopedia Britannica. Retrieved May 12, 2018.
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Brownell, Susan Elaine (1990). The olympic movement on its way into Chinese culture. University of California, Santa Barbara. pp. 29, 63. 以下は根拠文章"In both ancient China and Greece, the most popular sports were probably wrestling, boxing, and combinations thereof (Greek pankration, Chinese leitai). The same might be argued for ancient Egypt, India and Japan. [...] In both ancient China and Greece, the no-holds-barred combat sport (Greek pankration, Chinese leitai) was probably the most popular one."
