J.P. Verma, N. Padmaja*, J. Gopalkrishnan, J.C. Venketeshwari, R.P. Singh. “Activation of Peroxidase and Phenylalanine Ammonia Lyase in Cotton by Chemical and Biological Inducers”. Indian Phytopathology, vol. 57, no. 1, Mar. 2004, pp. 07-11, https://epubs.icar.org.in/index.php/IPPJ/article/view/17613.