4F. Griffith.The significance of pneumococcal types, J.Hyg, 1928, 27: 113-159.
5T. Avery, M.Macleod, M.McCarty.Studies on the chemical nature of the substance inducing transformation of pneumococcal types:Induction of transformation by a desoxyribonucleic acid fraction isolated from pneumococcus Type Ⅲ,J.Exp Med, 1944,79:137- 158.
6A.D. Hershey, Martha Chase. Independent functions of viral protein and nucleic acid in growth of bacteriophage, The Journal of General Physiology, 1952,36:39- 56.
