@ARTICLE{PiÄ…tkowski_Tomasz_Numerical_2010, author={PiÄ…tkowski, Tomasz and Sempruch, Janusz}, number={No 3}, journal={Archives of Transport}, howpublished={online}, year={2010}, publisher={Polish Academy of Sciences Committee of Transport Design}, title={Numerical Research of Positioning Process of Unit Loads by System of Oblique Friction Force Fields}, URL={http://journals.pan.pl/Content/94894/mainfile.pdf}, }