1. H. Haller undS. E. Strauzenberg,Orale Diabetestherapie (VEB Thieme, Leipzig 1966).
2. H. D. Söling undH. Ditschuneit, inHandbuch des Diabetes mellitus (Ed.E. F. Pfeiffer; Pathophysiologie und Klinik, J. F. Lehmanns Verlag, München 1969), vol. 1, p. 685.
3. J. Sterne, inOral Hypoglycaemic Agents (Ed.G. D. Campbell; Academic Press, London, New York 1969), p. 195.
4. H. Mehnert undH. S. Sadow, inOral Hypoglycaemic Agents (Ed.G. D. Campbell; Academic Press, London, New York 1969), p. 247.
5. R. Beckmann, Arzneimittel-Forsch.19, 628 (1969).