Diffusion and diffusional phase transformation in alloys : selected, peer-reviewed papers fom the 4th International Workshop "Diffusion and Diffusional Phase Transformations in Alloys", DIFTRANS-2007 : 16-21 July 2007, Sofoyivka (Uman'), Cherkasy region, Ukraine - Beke, D. L. (Dezso L.) (Diffusion and defect data. Defect and diffusion forum ;, 2008)