Cite as

Zhang Zengqiang, Shu Siyun, Liu Songhao, Guo Zhouyi, Wu Yongming, Bao Xinmin, Zheng Jinlong, Ma Hanzhang. Activated brain areas during simple and complex mental calculation-----A functional MRI study. Acta Physiol Sin 2008; 60 (4): 504-510 (in Chinese with English abstract).