1. R. H. Thomson , Naturally Occurring Quinones, 2nd edn, Academic Press, London, 1971, p. 282; see also p. 597
2. Pyranonaphthoquinone antibiotics—isolation, structure and biological activity
3. H. G. Floss , in: Antibiotics, ed. J. W. Corcoran, Springer, Berlin, 1981, vol. 4, p. 215 and references therein
4. Studies on the Biosynthesis of Antibiotics
5. Biosynthetic Studies on Antibiotics