1. in “The Alkaloids” (Ed. und ) Vol. I, 271, Academic Press, New York 1950;
2. in “The Alkaloids” Vol. VI, 145 Academic Press, New York (1960);
3. in “The Alkaloids” Vol. IX, 105 Academic Press, New York (1967);
4. in “The Alkaloids” Vol. XIII, 351 Academic Press, New York (1971).
5. und , Arzneimittel, 2. Aufl., Bd. 2, S. 71 ff., Verlag Chemie, Weinheim/Bergstr. 1972.