1. Wilmer, E.M.: Tissue culture. Methuen's monographs on biological subjects. London: Methuen & Co. 1935
2. Paul, J.: In: Growth, nutrition, and metabolism of cells in culture. Rothblat, G.H., Cristofolo, V.J. (eds.), Vol. 1, pp. 1. New York: Academic Press 1972
3. Weymouth, C.: In; Growth, nutrition, and metabolism of cells in culture. Rothblat, G.H., Cristofolo, V.J. (eds.), Vol. 1, p. 11. New York: Academic Press 1972
4. Earle, W.R., Schilling, E.L., Shannon, J.E.: J. Nat. Cancer Inst. 12, 179 (1951)
5. Earle, W.R., Bryant, J.C., Schilling, E.L.: Ann. N.Y. Acad. Sci. 58, 1000 (1953/54)