1. 1) Željko Kamberović, Endre Romhanji, Mirjana Filipović, Marija Korać: Metalurgiјa-Journal of Metallurgy, 15 (2009) 189-200.
2. 2) E. O. Hall: Proceedings of the Physical Society. B, 64 (1951) 747-753.
3. 3) N. J. Petch: Journal of Iron and Steel Institute, 174 (1953) 25-28.
4. 4) G. Mann, J. R. Griffiths, C. H. Caceres: Journal of Alloys and Compounds, 378 (2004) 188-191.
5. 5) Jinbao Lin, Weijie Ren, Qudong Wang, Lifeng Ma, Yongjun Chen: Advances in Materials Science and Engineering, (2014) Article ID 356572.