@article{Giertych:2011,
  author  = "M. Giertych and J. Suszka",
  title   = "Consequences of cutting off distal ends of cotyledons of Quercus robur acorns before sowing",
  journal = "Annals of Forest Science",
  volume  = "Vol. 68",
  number  = "no 2",
  pages   = "433--442",
  year    = "2011",
}