1. in The Alkaloids (Ed: ), Academic Press, New York, 1986, vol. 29, p. 287–324.
2. in Oxidative Coupling of Phenols (Eds: ), Marcel Dekker, New York, 1967, p. 140.
3. in Biogenesis of Natural Compounds (Ed: ), Pergamon Press, Oxford, 1963, p. 764.
4. The Isoquinoline Alkaloids, Pergamon Press, Oxford, 1965, p. 63.