1. Adlin, E. V., Channick, B. J., Marks, A. D.: Salivary sodium-potassium ratio and plasma renin activity in hypertension. Circulation39, 685 (1969)
2. Armstrong, M. L., Blake, J. L., Conrad, L. L., Freis, E. D., Fremont, R. E., Kirkendall, W. M., Pliz, C. C., Ramirez, E. A., Richardson, D. W., Williams, J. H., Jr.: A double blind control study of antihypertensive agents: II. Comparative effectiveness of reserpine, reserpine and hydralazine and the ganglionic blocking agents chlorisondamine, mecanylamine and pentolinium tartrate. Arch. intern. Med.106, 8 (1960)
3. Bayard, F., Beitins, J. Z., Kowarski, A., Migeon, C. J.: Measurement of plasma aldosterone by radioimmunoassay. J. clin. Endocr.31, 1 (1970)
4. Collins, R. D., Weinberger, M. H., Dowdy, A. J., Nokes, G. W., Gonzales, C. M., Luetscher, J. A.: Abnormally sustained aldosterone secretion during salt loading in patients with various forms of benign hypertension; relation to plasma renin activity. J. clin. Invest.49, 1415 (1970)
5. Dahl, L. K., Reilly, L.: Evidence for an increased intake of sodium in hypertension based on urinary excretion of sodium. Proc. Soc. exp. Biol. (N.Y.)94, 23 (1957)