B. Karthikeyan, U. S. S. M. “Studies on Isolation and Characterisation and Its Effect of Seed Inoculation of PGPR (Pseudomonas Fluorescens) on Yield of Tomato”. Journal of Phytology, vol. 1, no. 1, Sept. 2009, https://updatepublishing.com/journal/index.php/jp/article/view/1995.