1. Blood, C. H. & Zetter, B. R. (1990). Tumor interactions with the vasculature: angiogenesis and tumor metastasis. Biochim Biophys Acta 1032: 89–118.
2. Clauss, M., Gerlach, M., Gerlach, H., Brett, J., Wang, F., Familletti, P. C., Pan, Y. C., Olander, J. V., Connolly, D. T. & Stern, D. (1990). Vascular permeability factor: a tumor-derived polypeptide that induces endothelial cell and monocyte procoagulant activity, and promotes monocyte migration. J Exp Med 172: 1535–1545.
3. Dachs, G. U. & Stratford, I. J. (1996). The molecular response of mammalian-cells to hypoxia and the potential for exploitation in cancer therapy. Br J Cancer 74: S126–S132.
4. Elston, C. W. (1987). Grading of invasive breast carcinomas. In Diagnostic Histopathology of the Breast, Page D Anderson T (eds). Churchill Livingstone: Edinburgh
5. European Breast Cancer Co-operative Group (1980). Revision of the standards for the assessment of hormone receptors in human breast cancer; report of the second EORTC Workshop, held on 16–17 March 1979, the Netherlands Cancer Institute. Eur J Cancer 16: 1513–1513.