@ARTICLE{Choromański_W._Optimizing_2012, author={Choromański, W. and Fiok, K. and Dobrzyński, G.}, volume={60}, number={No 4}, journal={Bulletin of the Polish Academy of Sciences Technical Sciences}, pages={793-800}, howpublished={online}, year={2012}, title={Optimizing the lever propelling system for manual wheelchairs}, URL={http://www.journals.pan.pl/Content/83659/PDF/paper_15.pdf}, doi={10.2478/v10175-012-0092-8}, }