(EN) Brutzkus, J., The Khazar Origin of Ancient Kiev, in The Slavonic and East European Review. American Series, vol. 3, n. 1, Cambridge University Press, Association for Slavic, East European, and Eurasian Studies, maggio 1944, p. 110, DOI:10.2307/3020228, ISSN 1535-0940 (WC · ACNP).
«With reference to the founding of the town, the natives of Kiev recounted to Askold, "There were three brothers, Kii, Shchek, and Khoriv. They founded this town and died, and now we are staying and paying taxes to their relatives the Khazars.»