SUNARYANTO, R., MARWOTO, B., HARTOTO, L., MAS’UD, Z. A. and IRAWADI, T. T. (2011) “Cyclo (Tyrosyl-Prolyl) Produced by Streptomyces sp.: Bioactivity and Molecular Structure Elucidation”, Microbiology Indonesia, 5(2), p. 5. doi: 10.5454/mi.5.2.5.