1. Hevesy, G., and H. Levi: The Action of Neutrons on the Rare Earth Elements. Mathematisk-Fysiske Meddelelser 14, 3 (1936).
2. Lutz, G. J., R. J. Boreni, R. S. Maddock, and W. W. Meinke: Activation Analysis: A Bibliography, Parts I and II. National Bureau of Standards Technical Note 467. Washington, D. C.: U.S. Government Printing Office 1968.
3. Bowen, H. J. M., and D. Gibbons: Radioactivation Analysis. Oxford: Clarendon Press 1963.
4. Cali, J. P. (Ed.): Trace Analysis of Semiconductor Materials. Oxford: Pergamon Press 1964.
5. Centre D'Etudes Nucleaires De Saclay: L'Analyse Par Radioactivation Et Ses Application Aux Sciences Biologiques — 3e Colloque International De Biologie De Saclay. Paris: Presses Universitaires De France 1963.