Can a nonlinearity be neglected? An example

Graham W. Griffiths, Philippe Saucez, Alain Vande Wouwer, William E. Schiesser. Can a nonlinearity be neglected? An example. Mathematical and Computer Modelling, 40(11-12):1393-1403, 2004. [doi]

@article{GriffithsSWS04,
  title = {Can a nonlinearity be neglected? An example},
  author = {Graham W. Griffiths and Philippe Saucez and Alain Vande Wouwer and William E. Schiesser},
  year = {2004},
  doi = {10.1016/j.mcm.2005.01.026},
  url = {http://dx.doi.org/10.1016/j.mcm.2005.01.026},
  researchr = {https://researchr.org/publication/GriffithsSWS04},
  cites = {0},
  citedby = {0},
  journal = {Mathematical and Computer Modelling},
  volume = {40},
  number = {11-12},
  pages = {1393-1403},
}