@article{Piontek:2000,
  author  = "M. Piontek and B. Nguyen Thi",
  title   = "The effect of sewage sludge composting on the quantitative state of some groups of bacteria and fungi",
  journal = "Acta Microbiologica Polonica",
  volume  = "Vol. 49",
  number  = "nr 1",
  pages   = "s. 88--93",
  year    = "2000",
}