Oral health status and its correlation with oral health knowledge among middle-aged people in Dongxiang, Bonan, and Yugur
Li Zhiqiang, Zhou Jianye, Hu Xiaopan, Yu Zhanhai, Ma Liyang, Lian Weijuan.
West China Journal of Stomatology . 2013, (5): 487 -492 .  DOI: 10.7518/hxkq.2013.05.011