Kaiser, Daniel H. (2009). "Richard Hellie (1937–2009)". Kritika: Explorations in Russian and Eurasian History. 10 (4): 999–1006. doi:10.1353/kri.0.0128. S2CID153403997.
Kaiser, Daniel H. (2009). "Richard Hellie (1937–2009)". Kritika: Explorations in Russian and Eurasian History. 10 (4): 999–1006. doi:10.1353/kri.0.0128. S2CID153403997.