1. Heterogeneity in drug sensitivity among tumor cell subpopulations of a single mammary tumor;Heppner;Cancer Res,1978
2. Tumor heterogeneity and the biology of cancer invasion and metastasis;Fidler;Cancer Res,1978
3. Differential sensitivities of human melanoma cells grown in vitro to arabinosylcytosine;Barranco;Cancer Res,1972
4. In vitro and in vivo selection of two Lewis lung carcinoma cell lines;Sacchi;Tumori,1979
5. Cloning in vitro and in vivo of Lewis lung carcinoma: properties and characteristics;Zupi;Br J Cancer,1980