1. Hansen O.: “Do putative endogenous digitalis-like factors have a physiological role?” Letters to the Editor. Hypertension 24, 640 (1994).
2. Doris P.A.: Response #1 to Letters to the Editor: “Do putative endogenous digitalis-like factors have a physiological role?” Hypertension 24, 640–641 (1994).
3. Hamlyn J.M., Laredo J., Lu Z.-R., Hamilton B., Lighthall G.: Response #2 to Letters to the Editor: “Do putative endogenous digitalis-like factors have a physiological role?” 24, 641–643 (1994).
4. Buckalew V.M., Jr., Haddy F.J.: “Circulating natriuretic factors in hypertension”. In: Brenner, B.M. and J.H. Laragh (Ed.): Hypertension: Pathophysiology, Diagnosis, and Management. Chapter 60, pp 939–954 (1990).
5. Wechter W.J., Benaksas E.J.: “Natriuretic hormones”. In: Jucker E. (Ed.): Progress in Drug Research 34, 232–260, Birkhäuser Verlag Basel, Switzerland 1990.