“Determination of Optimum Composition of Fermentation Medium for Citric Acid Production from Watermelon Rinds Using Response Surface Methodology: Https: doi.org 10.26538 Tjnpr V1i1.3”. 2017. Tropical Journal of Natural Product Research 1 (1): 12-16. https://tjnpr.org/index.php/home/article/view/3.