Rüß, Hartmut. “Should Kievan Rus’ Be Forgotten? (German Gymnasium History Textbooks of the Late 20th Century)”. Quaestio Rossica 6, no. 2 (June 30, 2018): 581–595. Accessed January 29, 2020. https://qr.urfu.ru/ojs/index.php/qr/article/view/314.