@article{Winnicki_M._Examination_2011, author={Winnicki, M. and Zwierzchowski, M. and Ambroziak, A. and Laska, P. and Lachowicz, M. and Leśniewski, J.}, number={No 4 December}, howpublished={online}, journal={Archives of Metallurgy and Materials}, year={2011}, publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences}, publisher={Commitee on Metallurgy of Polish Academy of Sciences}, title={Examination of Friction Coefficient in Friction Welding Process of Tubular Steel Elements}, doi={10.2478/v10172-011-0107-8}, }