PUTRIE, R. F. W., T. WIDOWATI, and H. SUKIMAN. “Studies for IAA (Indole-3-Acetic Acid) Production by Isolates H6 With Nitric Acid Mutation”. Microbiology Indonesia, vol. 11, no. 1, July 2017, p. 3, doi:10.5454/mi.11.1.3.