中国科学院数学与系统科学研究院期刊网
AMS
Multiplicity of Homoclinic Solutions for Second Order Hamiltonian Systems with Local Conditions at the Origin
Peng LIU, Fei GUO
Acta Mathematica Sinica . 2022, (4): 735 -744 .  DOI: 10.1007/s10114-022-0626-4