@article{escidoc:0088, title = {{Ferromagnetic behaviour of ZnO: the role of grain boundaries}}, author = {Straumal, B. B. and Protasova, S. G. and Mazilkin, A. A. and Goering, E. and Sch\"utz, G. and Straumal, P. B. and Baretzky, B.}, journal = {{Beilstein Journal of Nanotechnology}}, volume = {7}, pages = {1936--1947}, publisher = {Beilstein-Institut}, address = {Frankfurt am Main}, year = {2016}, doi = {10.3762/bjnano.7.185} }