Tamura, Fumiyo, 		Kikutani, Takeshi, 		Furuya, Hiroyasu, 		Okayama, Hiromi, AND 		Noriaki, Takahashi.
" A Study of Tongue Thickness in Elderly People in Japan" <em>Medical Research Archives</em> [Online], Volume 5 Number 8 (15 August 2017)