1. 1) N. Hansen: Metall. Mater. Trans. A 32(2001) 2917–2935.
2. 2) B. S. Altan (Ed.): Severe Plastic Deformation: Towards Bulk Production of Nanostructured Materials, (Nova Science Publishers Inc., New York, 2006).
3. 3) A. Malin, J. Huber and M. Hatherly: Z. Metallk. 72(1981) 310–317.
4. 4) M. Wrobel, S. Dymek, M. Blicharski and S. Gorczyca: Z. Metallk. 85(1994) 415–425.
5. 5) Q. Liu and N. Hansen: Phys. Stat. Solidi A 149(1995) 187–199.