@article{Lukierski:2002,
  author  = "J. Lukierski and A. Nowicki",
  title   = "Nonlinear and quantum origin of doubly infinite family of modified addition laws for fourmomenta",
  journal = "Czechoslovak Journal of Physics",
  volume  = "Vol. 52",
  number  = "no 11",
  pages   = "1261--1268",
  year    = "2002",
}