Birnbaum, Henrik. “Reflections on the Language of Medieval Novgorod”. Russian Linguistics, vol. 15, no. 3, 1991, pp. 195-1, https://doi.org/10.1007/bf02539238.
Birnbaum, H. (1991). Reflections on the language of medieval Novgorod. Russian Linguistics, 15(3), 195-215. https://doi.org/10.1007/bf02539238
Birnbaum H. Reflections on the language of medieval Novgorod. Russian Linguistics. 1991;15(3):195-21.