J.-S. Kim, Y.-S. Jeon, S.-D. Park, Y.-J. Park, Y.-K. Ha, and K. Song, “Determination of Uranium, Plutonium, Neodymium, Gadolinium and Their Isotopes in UO2-Gd2O3 Spent Nuclear Fuels”, ajc, vol. 24, no. 7, pp. 3274–3278, Mar. 2012.