@article{Valcarcel:2009Cq,
  author = "Valcarcel, Carlos E  and  Bertin, Mario  and  Pimentel, B. M.  and  Zambrano, German",
  title = "{Hamilton-Jacobi formalism on the Null-Plane: Applications.}",
  doi = "10.22323/1.081.0046",
  journal = "PoS",
  year = 2009,
  volume = "ISFTG",
  pages = "046"
}