Wu Xiangding, Zhan Xuzhi. The applicability of spline function fitting in dendroclimatological analysis. Acta Meteorologica Sinica, 1991,49(1):100-103.
Xu Zhongfeng, Qian Yongfu. 2006. Mist potential vorticity index of Indian monsoon and its relationship with climate in China[J]. Acta Meteorologica Sinica, 64(6):760-769.