@ARTICLE{Zabulionis_D._An_2012,
 author={Zabulionis, D. and Kačianauskas, R. and Markauskas, D. and Rojek, J.},
 volume={60},
 number={No 2},
 journal={Bulletin of the Polish Academy of Sciences Technical Sciences},
 pages={265-278},
 howpublished={online},
 year={2012},
 title={An investigation of nonlinear tangential contact behaviour of a spherical particle under varying loading},
 URL={http://journals.pan.pl/Content/83549/PDF/12_paper.pdf},
 doi={10.2478/v10175-012-0036-3},
}