Lihua Zheng Minzan Li Caicong Wu Haijian Ye Ronghua Ji Xiaolei Deng Yanshuang Che Cheng Fu Wei Guo 1194-1203 2011 54 Math. Comput. Model. 3-4 https://doi.org/10.1016/j.mcm.2010.11.053 db/journals/mcm/mcm54.html#ZhengLWYJDCFG11