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Panzer A, Joubert AM, Eloff JN, Albrecht CF, Erasmus E, Seegers JC (November 2000). "Chemical analyses of Ukrain, a semi-synthetic Chelidonium majus alkaloid derivative, fail to confirm its trimeric structure". Cancer Letters. 160 (2): 237–41. doi:10.1016/s0304-3835(00)00595-4. PMID11053654.
"Krebskranke getäuscht: Festnahmen" [Cancer sufferer deceived: arrests]. wien.orf.at (in German). 4 September 2012. Archived from the original on 9 December 2018. Retrieved 10 December 2018.
"Krebskranke getäuscht: Festnahmen" [Cancer sufferer deceived: arrests]. wien.orf.at (in German). 4 September 2012. Archived from the original on 9 December 2018. Retrieved 10 December 2018.