1. Allan, R. K. 1964: Rolling bearings. 3rd Ed. London: Pitman
2. Beer, R.; Peterschinegg H. 1977: Reckvorspannung in Kreissägeblättern. (Tensioning stresses in circular sawblades.) Österr. Ing.-Z. 20: 155–162
3. Clephane, T. P.; Carroll, J. 1981: Timber: even non-industry investors realize its value. Forest Ind. 108: 49–51
4. Eldredge, K. R.; Tabor, D. 1955: The mechanism of rolling friction. I. The plastic range. Proceed. Royal Soc. Ser A, 229: 181–198
5. Hardy, C.; Baronet, C. N.; Tordion, G. V. 1971: The elasto-plastic indentation of a half-space by a rigid sphere. International J. Numer. Meth. Eng. 3: 451–462