Straumal, B. B., Mazilkin, A. A., Protasova, S. G., Straumal, P. B., Myatiev, A. A., Schütz, G., et al. (2012). Ferromagnetism of nanostructured zinc oxide films. The Physics of Metals and Metallography, 113(13), 1244-1256. doi:10.1134/S0031918X12130030.