Camacho, A., G. Jaworski, G. Keppel, and L. Sajo-Bohus. 2017. “Alpha Emitter Intrinsic Concentration in Copper Required for Nuclear Spectrometry Application”. Journal of Nuclear Physics, Material Sciences, Radiation and Applications 5 (1):213-22. https://doi.org/10.15415/jnp.2017.51020.