1. The National Cancer Institute: Cancer drug discovery and development program;Grever;Semin Oncol,1992
2. Natural products as sources of new drugs over the period 1981-2002;Newman;J Nat Prod,2003
3. New applications of microbial products;Demain;Science,1983
4. Natural plant chemical: Sources of industrial and medicinal materials;Balandrin;Science,1985
5. Functions of secondary metabolites;Vining;Annu Rev Microbiol,1990