1. Allen, T. D., P. T. Iype, and M. J. Murphy, 1978. The surface morphology of normal and malignant rat liver epithelial cells in culture. In Vitro, 12:837–844.
2. Borenfreund, E., P. J. Higgins, M. Steinglass, and A. Bendich, 1975. Properties and malignant transformation of established rat liver parenchymal. J. Natl. Cancer Inst., 55: 375–384.
3. Connors, T. A., P. J. Cox, P. B. Farmer, A. B. Foster, and M. Jarman, 1974. Some studies of the active intermediates formed in the microsomal metabolism of cyclophosphamide and isophosphamide. Biochem. Pharmacol , 23: 115–129.
4. Davidson, R. L., and P. S. Gerald, 1976. Improved techniques for the induction of mammalian cell hybridization by polyethylene glycol. Somat. Cell Genet , 2: 165–176.
5. Fusenig, N. E., S. M. Amer, P. Boukam, M. Lueder, and P. K. M. Worst, 1978. Methods for studying neoplastic transformation epidermal cells in culture by chemical carcinogens, pp. 53–70. In: “Methods for Carcinogenesis Tests at the Cellular Level and Their Evaluation for the Assessment of Occupational Cancer Hazards,” E. Vigliani (ed.). Carlo Erba Foundation, Italy.