1. Anke M, Groppel B, Arnold W, Langer M, Krause U. Trace Elements in Clinical Medicine. Springer Verlag, Berlin, 1990; 361
2. Gerber GB. Germanium. In: Seiler H, Sigel H, eds. Handbook on Toxicity of Inorganic Compounds. Dekker, New York 1988; 301–305
3. Schein PS, Slavik M, Smythe T et al. Phase I clinical trial of spirogermanium. Cancer Treat Rep1980; 64: 1051–1056
4. Kuebler JP, Tormey DC, Harper GR, Chang YC, Khandekar JD, Falkson G. Phase II study of spirogermanium in advanced breast cancer. Cancer Treat Rep1984; 68: 1515–1516
5. Falkson G, Falkson HC. Phase II clinical trial of spirogermanium for treatment of advanced breast cancer. Cancer Treat Rep1983; 67: 189–190