Perturbation to Mei symmetry and Mei adiabatic invariants for discrete generalized Birkhoffian system von 张克军 方建会 李燕

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Symmetry and conserved quantities of discrete generalized Birkhoffian system von 张克军 方建会 李燕

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Perturbation to Noether Symmetry and Noether Adiabatic Invariants of General Discrete Holonomic Systems von 张明江 方建会 路凯 张克军 李燕

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Conformal invariance and a kind of Hojman conserved quantity of the Nambu system von Li, Yan (燕李), Fang, Jian-Hui (建会 方), Zhang, Ke-Jun (克军 张)

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