Valkonen, Jari P. T., and Jukka P. Palohuhta. “Resistance to Potato Virus A and Potato Virus Y in Potato Cultivars Grown in Finland”. Agricultural and Food Science 5, no. 1 (January 1, 1996): 57–62. Accessed May 2, 2024. https://journal.fi/afs/article/view/72730.