@article{Boratyński:2009,
  author  = "A. Boratyński and A. Jasińska and K. Boratyńska and G. Iszkuło and M. Piórkowska",
  title   = "Life span of needles of pinus Mugo turra: effect of altitude and species origin",
  journal = "Polish Journal of Ecology",
  volume  = "Vol. 57",
  number  = "nr 3",
  pages   = "567--572",
  year    = "2009",
}