@ARTICLE{Rotkegel_Marek_Contribution_2001,
 author={Rotkegel, Marek},
 number={No 3},
 journal={Archives of Mining Sciences},
 pages={267-289},
 howpublished={online},
 year={2001},
 publisher={Committee of Mining PAS},
 type={Article},
 title={Contribution to the problem of frame clear interval determination of rectangular steel support},
 URL={http://journals.pan.pl/Content/132252/PDF-MASTER/5_MINING_46_3_2001_Rotkegel_CONTRIBUTION.pdf},
}