2C. Eugene Wayne. Periodic and quasi-periodic solutions of nonlinear wave equations via KAM theory[J] 1990,Communications in Mathematical Physics(3):479～528
3Jürgen P?schel. On elliptic lower dimensional tori in hamiltonian systems[J] 1989,Mathematische Zeitschrift(4):559～608
二级参考文献1
1Jürgen P?schel. On elliptic lower dimensional tori in hamiltonian systems[J] 1989,Mathematische Zeitschrift(4):559～608
