A. Baimukhanova, E. Chakrova, D. Karaivanov, J. Kozempel, F. Roesch, and D. Filosofov, “Production of the positron-emitting radionuclide 68Ga: the radiochemical scheme of radionuclide generator 68Ge → 68Ga”, Chemical Bulletin of Kazakh National University, vol. 89, no. 2, pp. 20-26, Jun. 2018.