中国科学院数学与系统科学研究院期刊网
Commutation Formulas of Two Lax Operator and Two Master Symmetries for KP Hierarchy
Xin Shen GU
Acta Mathematica Sinica, Chinese Series . 2001, (1): 149 -158 .  DOI: 10.12386/A2001sxxb0020