MA, S., and S. T. D. “Variation in Air Pollution Tolerance Index and Anticipated Performance Index of Plants Near a Sugar Factory: Implications for Landscape-Plant Species Selection for Industrial Areas”. Journal of Research in Biology, Vol. 1, no. 7, Nov. 2011, pp. 494-02, https://ojs.jresearchbiology.com/index.php/jrb/article/view/132.