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2. (b) P. Köpf-Maier, H. Köpf, Struct. Bond. 70 (1988) 105.
3. (c) P. Köpf-Maier, H. Köpf, in: S.P. Fricker (Ed.), Metal Compounds in Cancer Chemotherapy, Chapman & Hall, London, 1994, p. 109.
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