1. The World Health Organization: Histological typing of lung tumors. WHO, Geneva, Switzerland, 1982.
2. Matthews MJ, Gazdar AF: Small cell carcinoma of the lung and its variants. A clinicopathologic correlation. In: Lung Cancer: advances in research and treatment, McGuire WW, Livingston EB (eds). The Hague, Martinus Nijhoff, pp 283–306, 1981.
3. Carter D, Eggleston JC: Atlas of tumor pathology. Fascile 17, 1979.
4. Greco FA, Oldham RK: Current concepts in cancer. Small-cell lungcancer. N Engl J Med 301:355–358, 1979.
5. Baylin SB, Mendelsohn G: Time dependent changes in human tumors: Implications for diagnosis and clinical behaviour. Semin Oncol 9:504–512, 1982.