Michal Johnson, Joy, et al. “Piriformospora Indica: The Versatile and Multifunctional Root Endophytic Fungus for Enhanced Yield and Tolerance to Biotic and Abiotic Stress in Crop Plants”. Journal of Tropical Agriculture, vol. 52, no. 2, Dec. 2014, pp. 103-22, https://jtropag.kau.in/index.php/ojs2/article/view/311.