@article{Blas:2009/Q,
  author = "Blas, Harold  and  dos Santos, Luis F.  and  da Silva, Max Jose Botelho-Ferreira",
  title = "{Nonvanishing boundary conditions and dark solitons in the NLS model }",
  doi = "10.22323/1.081.0043",
  journal = "PoS",
  year = 2009,
  volume = "ISFTG",
  pages = "043"
}