@article{Drab:2009,
  author  = "M. Drab and A. Greinert and S. Węclewski",
  title   = "The response of selected deciduous trees and bushes to sludge fertilization",
  journal = "Polish Journal of Environmental Studies : Series of Monographs",
  volume  = "Vol. 6",
  pages   = "35--40",
  year    = "2009",
}