1. The serial cultivation of human diploid cell strains;Hayflick;Exp. Cell Res.,1961
2. The limited in vitro lifetime of human diploid cell strains;Hayflick;Exp. Cell Res.,1965
3. Cell senescence and cell differentiation in vitro;Hayflick,1972
4. The cellular basis for biological aging;Hayflick,1977
5. Animal cell cultures as a model system for the study of aging;Cristofalo,1972