H.N. VERMA, V.K. BARANWAL* and. “Virus Inhibitory Activity of Leaf Extracts from Different Taxonomic Groups of Higher Plants”. Indian Phytopathology, vol. 46, no. 4, Jan. 2002, pp. 402-3, https://epubs.icar.org.in/index.php/IPPJ/article/view/21507.