Patiyuth, S. (2000) “Studies on The N2 - Fixing Bacteria Association with Yvetiver 1) biosynthesis of Plant Grwoth Hormone by Asospirillum. 2) Use of the gusA Gene to Study Azospirillum”, Thai Agricultural Research Journal, 18(3), pp. 233–237. doi: 10.14456/thaidoa-agres.2000.17.