Mahfut, M., and B. S. Daryono. “Variation Symptoms and Resistance Response of Different Types on Orchids (Orchidaceae) Against Odontoglossum Ringspot Virus (ORSV) Infection”. International Series on Interdisciplinary Science and Technology, vol. 4, no. 2, Aug. 2020, pp. 246-9, https://insist.unila.ac.id/index.php/ojs/article/view/168.