@article{Dryzek:2006,
  author  = "E. Dryzek and J. Dryzek",
  title   = "Positron annihilation studies of the subsurface zone in aluminium alloys",
  journal = "Acta Physica Polonica A",
  volume  = "Vol. 110",
  number  = "no 5",
  pages   = "569--575",
  year    = "2006",
}