1. Chromatographic separation and concentration of thorium and rare earths from uranium using alumina-hydrofluoric acid. Preparation of carrier free radiothorium and contribution to the fission rare earths;Abrao,1980
2. Entwicklung einer analysen methode fur die bestimmung von 238U, 234U, 232Th, 230Th, 228Th, 228Ra, 226Ra, 210Po and 210Pb und ihre anwendung auf unweltproben;Godoy;Doktor Thesis, Technischen Universitat Munchen or KfK Report-3503,1983
3. Determination of dissolved radium;Goldin;Anal. Chem.,1961
4. Determination of 224Ra, 226Ra and 228Ra by coincidence spectrometry;Mellor;Anal. Chem.,1981
5. Sequential determination of 226Ra, 228Ra, 228Ac and thorium isotopes in environmental and process waste samples;Percival;Anal. Chem.,1974