@article{ICF Diametros_2009, title={Acknowledgements (in Polish)}, url={https://diametros.uj.edu.pl/diametros/article/view/376}, DOI={10.13153/diam.22.2009.376}, number={22}, journal={Diametros}, author={ICF Diametros, Redakcja}, year={2009}, month={Dec.}, pages={242} }