A.I. BHAT and A. VARMA, GOURGOPAL ROY, R.K. JAIN*,. “Comparative Host Range and Serological Studies of Papaya Ringspot Potyvirus Isolates”. Indian Phytopathology, vol. 52, no. 1, June 2002, pp. 14-17, https://epubs.icar.org.in/index.php/IPPJ/article/view/19441.