中国科学院数学与系统科学研究院期刊网
The Noncommutative Differential Methodology to Obtain the Lie Symmetry of Differential-difference Equations
BAI Yongqiang, PEI Ming, DAI Xiaojing
Acta Mathematicae Applicatae Sinica . 2015, (1): 98 -108 .  DOI: 10.12387/C2015010