นิติสิริ ท. 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. Th Dent PH J 1993, 1, 50.