“MULTIFUNCTIONAL MUTANTS OF Azospirillum Sp. WITH ENHANCED CAPABILITY OF SOLUBILIZING PHOSPHORUS, FIXING NITROGEN AND PRODUCING INDOLE ACETIC ACID”. Indonesian Journal of Agricultural Science, vol. 13, no. 1, Apr. 2013, pp. 12-17, https://epublikasi.pertanian.go.id/berkala/ijas/article/view/588.