Pohjakallio, Onni, and Laura Karhuvaara. “Resistance to Virus Diseases of Some F1 Clones Descended from the Species Hybridization Solanum Demissum X S. Tuberosum”. Agricultural and Food Science 32, no. 1 (January 1, 1960): 73–80. Accessed May 5, 2024. https://journal.fi/afs/article/view/71538.