Büsgen, T., Hilgendorff, M., Irsen, S., Wilhelm, F., Rogalev, A., Goll, D., et al. (2008). Colloidal cobalt-doped ZnO nanorods: synthesis, structural, and magnetic properties. Journal of Physical Chemistry C, 112(7), 2412-2417. doi:10.1021/jp077546t.