1. Effect of pH of the medium on activity of streptomycin and penicillin;Abraham, E.P.; Duthie, E.S.;Lancet,1946
2. Selective Toxicity;Albert, A.,1968
3. Campbell, E. J. M., and Dickinson, C. J. (1960). Clinical Physiology, p. 103. Blackwell, Oxford.
4. Effect of hydrogen ion concentration on toxicity of alkaloids for paramoecium;Crane, M.M.;J. Pharniacol. exp. Ther,1921
5. The effect of the pH of the medium on the antibacterial action of penicillin, streptomycin, chloramphenicol, terramycin, and bacitracin;Eagle, H.; Levy, M.; Fleischman, R.;Antibiotics and Chemotherapy,1952