Slavonic
| Author(s) | Title | Reference | |
|---|---|---|---|
| J.L.N. O'Loughlin | Proceedings of the British Academy 1953 | 26/1, p. 54 | |
| Thomas M. Parker | The Bogomils: a study in Balkan Neo-Manichæism, by Dmitri Obolensky | 18/, p. 68 | |
| Alan S.C. Ross | Lingua Posnaniensis: revue de philologie comparée et de linguistique générale. Vol. I | 20/, p. 103 |