M. UMA MAHESWARI, and K. DHANDAYUTHAPANI. “FERMENTATION OPTIMIZATION FOR PRODUCTION OF POLYHYDROXYBUTYRATE (PHB) BY NEWLY ISOLATED AZOTOBACTER VINELANDII KDP”. International Journal of Pharma and Bio Sciences, vol. 4, no. 3, Sept. 2013, pp. 779-87, https://ijpbs.net/index.php/journal/article/view/2640.