@misc{indiciaee05f105892ec,
  title = {Periodic solutions of second-order nonlinear difference equations containing a small parameter. II - Equivalent linearization},
  author = {Mickens, R. E.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19860036103},
  note = {Source identifier: 19860036103}
}