Ammar, M., S. Hameed, I. U. Haque, S. M. Mughal, H. Riaz, R. Parveen, and G. Yasmin. “SEROLOGICAL IDENTIFICATION OF CITRUS TRISTEZA CLOSTEROVIRUS (CTV) AND MOLECULAR CHARACTERIZATION OF ITS COAT PROTEIN GENE”. Pakistan Journal of Phytopathology, vol. 25, no. 1, June 2013, pp. 23-36, https://www.pjp.pakps.com/index.php/PJP/article/view/4.