- Preclinical evaluation of the alpha-particle generator nuclide 225Ac for somatostatin receptor radiotherapy of neuroendocrine tumors. Miederer, M., Henriksen, G., Alke, A., Mossbrugger, I., Quintanilla-Martinez, L., Senekowitsch-Schmidtke, R., Essler, M. Clin. Cancer Res. (2008)