@article{Turek:2004,
  author  = "M. Turek and P. Rozmej",
  title   = "Spin-orbit entanglement in time evolution of radial wave packets in hydrogenic systems",
  journal = "Open Systems & Information Dynamics",
  volume  = "Vol. 11",
  number  = "no 4",
  pages   = "401--409",
  year    = "2004",
}