1、[1] Weichao Qian, Yong Li and Xue Yang, Quasiperiodic Poincaré persistence at high degeneracy. Advances in Mathematics 436 (2024), Paper No. 109399,48 pp
2、[2] Weichao Qian, Yong Li and Xue Yang, Multiscale KAM theorem for Hamiltonian systems. Journal of Differential Equations 266 (2019), 70-86.
3、[3] Weichao Qian, Yong Li and Xue Yang, Persistence of Lagrange invariant tori at tangent degeneracy. Journal of Differential Equations 268 (2020), 5078-5112.
4、[4] Weichao Qian, Xue Yang and Yong Li, KAM persistence for multiscale generalized Hamiltonian systems. Communications in Mathematical Sciences 21(2023),559-579.
5、[5] Weichao Qian, Yong Li and Xue Yang, Melnikov's conditions in matrices. Journal of Dynamics and Differential Equations 32 (2020), 1779-1795.
6、[6] Weichao Qian, Yong Li and Xue Yang, The isoenergetic KAM-type theorems at resonant case for nearly integrable Hamiltonian systems. The Journal of Applied Analysis and Computation 9 (2019), 1616-1638.
7、[7] Weichao Qian, KAM theorem and iso-energetic KAM theorem on Poisson manifold.The Journal of Applied Analysis and Computation 13(2023), 1088-1107.