@incollection{escidoc:0739, title = {{Effect of Grain Boundary Phase Transitions on the Superplasticity in the Al-Zn System}}, author = {Lopez, G.A. and Straumal, B.B. and Gust, W. and Mittemeijer, E.J.}, booktitle = {{Nanomaterials by Severe Plastic Deformation}}, pages = {642--647}, publisher = {Wiley-VCH Verlag}, address = {Weinheim}, year = {2004}, doi = {} }