1. Beretta-Piccoli C, Davies DL, Boddy K, Brown JJ, Cumming AMM, East BW, Fraser R, Lever AF, Padfield PL, Semple PF, Robertson JIS, Weidmann P, Williams ED (1982): Relation of arterial pressure with body sodium, body potassium and plasma potassium in essential hypertension. Clinical Science 63: 257–270.
2. Birkenhäger WH, de Leeuw PW, Schalekamp MADH (1982): Control mechanisms in essential hypertension. 2nd Edition Chapter 2, pp. 31–64. Elsevier Biomedical Press, Amsterdam, New York, Oxford.
3. Brown JJ, Davies DL, Johnson VW, Lever AF, Robertson JIS (1970): Renin relationship in congestive cardiac failure, treated and untreated. Am Ht J 80: 329–342.
4. Brown MJ, Causon RC, Barnes VF, Brennan GB, Greenberg G (1985): Urinary catecholamines in essential hypertension: results of 24-hour urine catecholamine analysis from patients in the Medical Research Council Trial for mild hypertension and matched controls. AnartJ Med 57: 637–645.
5. De Crée J, Van Rooy P, Geukens H, Haeverans K, Verhaegen H (1988): Double-blind placebo controlled studies of nebivolol in patients with essential hypertension. In: Proceedings, ‘Cardiovascular Disease and β-Adrenoceptor Function’. Antwerp, p. 20.