1. The serial cultivation of human diploid cell strains;Hayflick;Exp. Cell Res.,1961
2. The cellular basis for biological aging;Hayflick,1977
3. Changes of glycosaminoglycan synthesis during in vitro ageing of human fibroblasts (WI-38);Schachtschabel;Akt. Gerontol.,1978
4. Age-related decline in the synthesis of glycosaminoglycans by cultured human fibroblasts (WI-38);Schachtschabel;Mech. Ageing Dev.,1978
5. Growth-promoting activity of acid mucopolysaccharides on a strain, of human mammary carcinoma cells;Ozzello;Cancer Res.,1960