William Kleesmann, M. (1957) „The phonemes of tenth-century East Slavonic in the light of Byzantine evidence“, Slavistična revija, 10(1-4), str. 160–171. Dostopno na: https://srl.si/ojs/srl/article/view/1957-1-4-0-16 (Pridobljeno: 23 november 2024).