1. Foulds L,Neoplastic Development. New York: Academic Press, 1975.
2. Macdonald NJ and Steeg PS, 1993, Molecular basis of tumour metastasis.Cancer Surv,16, 175–99.
3. Schmandt R and Mills GB, 1993, Genomic components of carcinogenesis.Clin Chem,39, 2375–85.
4. Hart IR and Easty DJ, 1991, Tumour cell progression and differentiation in metastasis.Semin Cancer Biol,2, 87–95.
5. Paget S, 1889, The distribution of secondary growth in cancer of the breast.Lancet,i, 571–3.