1. Gaffney, T.E., Knapp, D., Walle, T., Privitera, P., Saelens, D.: The importance of stable isotope labelled drugs in clinical pharmacology with illustrations from studies on the disposition of propranolol and nortriptyline in man. Proceedings of the First International Conference on Stable Isotopes in Chemistry, Biology and Medicine. Argonne National Laboratory (May, 1973). P.D. Klein (ed.) USAEC CONF. ? 730525. Springfield, Virginia: National Technical Information Service, U.S. Department of Commerce 1973
2. Gregg, C.T., Hutson, J.H., Prine, J.R., Ott, D.G., Furchner, J.E.: Substantial replacement of mammalian body carbon with carbon-13. Life Sci.13, 775 (1973)
3. Gregg, C.T., Smith, D., Ott, D.G., Malanify, J., McInteer, B.B., Matwiyoff, N., Neubert, D.: Incorporation of carbon-13 into fetal and maternal protein and nucleic acid during various intervals of pregnancy in mice. Abstracts Ninth International Congress of Biochemistry, Stockholm, Sweden, July, 1973
4. Horning, M.G., Stillwell, W.G., Nowlin, J., Lertratanangkoon, K., Carroll, D., Dzidic, I., Stillwell, R.N., Horning, E.C., Hill, R.M.: The use of stable isotopes in studies of drug metabolism. Proceedings of the First International Conference of Stable Isotopes in Chemistry, Biology and Medicine. Argonne National Laboratory (May, 1973), P.D. Klein (ed.) USAEC CONF. ? 730525, Springfield, Virginia: National Technical Information Service, US Department of Commerce 1973
5. Horning, E.C., Horning, M.G., Carroll, D., Dzidic, I., Stillwell, R.N.: New picogram detection system based on a mass spectrometer with an external ionization source at atmospheric pressure. Analyt. Chem.45, 936 (1973)