1. Willis RA: Pathology of Tumours. 4th Edition, Butterworths, London, p. 174, 1964.
2. Bross DJ, Blumenson LE: In: Weiss L (ed.) Fundamental Aspects of Metastasis. North Holland Publishing Co., Amsterdam, pp. 359–375, 1976.
3. Weiss L, Haydock K, Pickren JW, Lane W: Organ vascularity and metastatic frequency. Am. J. Pathol. 101: 101–113, 1980.
4. Coman DR, Delong RP: The role of the vertebral venous sytem in the metastases of cancer to the spinal column. Cancer 4: 610–618, 1951
5. Murphy P, Taylor I, Alexander P: The efficiency of trapping blood borne cancer in the organ of first encounter using experimental rat tumours. Br. J. Surgery (In press).