De Paula, E. B., M. T. F. de Araújo, R. Poledna, J. U. Delgado, and A. Leiras. “Development of a Methodology for the Analysis of Radionuclide Impurities in Radiopharmaceuticals by Gamma-Ray Spectrometry”. Brazilian Journal of Radiation Sciences, vol. 5, no. 3-A, Nov. 2017, doi:10.15392/bjrs.v5i3.300.