P. N. and P. MUTHULAKSHMI, “Methods of assessment of intensity of rice tungro disease (RTD)”, Indian Phytopath., vol. 49, no. 3, pp. 278–280, Jan. 2002, Accessed: Oct. 20, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IPPJ/article/view/20085