นิติสิริ ท. 1993. The effect of an experimental chewable antiplague preparation containing chlorhexidine on plague and gingival index scores Nuja TT, Murtomaa HT, Meurman JH, Pesonen TJ J Dent Res 1992 ; 71 (5) : 1156-8. Thai Dental Public Health Journal. 1, 1 (Jul. 1993), 50.