V.G. GOSWAMI, U.K. KHARE and. 2002. “Studies on Metabolites Produced by Alternaria Porri, the Causal Organism of Purple Blotch of Onion”. Indian Phytopathology 49 (2): 167-69. https://epubs.icar.org.in/index.php/IPPJ/article/view/20060.