SpringerOpen Newsletter

Receive periodic news and updates relating to SpringerOpen.

Open Access Research

Infinitely many periodic solutions for subquadratic second-order Hamiltonian systems

Hua Gu* and Tianqing An

Boundary Value Problems 2013, 2013:16  doi:10.1186/1687-2770-2013-16

Article Metrics

Total accesses

Article metric FAQ


  • Last 30 days: 29 accesses
  • Last 365 days: 300 accesses
  • All time: 1123 accesses

These numbers are accesses on SpringerOpen websites only, and an underestimate of total usage. More information