@article{Piontek:1998,
  author  = "M. Piontek",
  title   = "Application of Dugesia tigrina Girard in troxicological studies of aquatic environments",
  journal = "Polskie Archiwum Hydrobiologii",
  volume  = "Vol. 45",
  number  = "nr 4",
  pages   = "565--572",
  year    = "1998",
}