Alexandr V. Zelenin, Dmitry V. Rudnev. Copular verb slyt’: the history of modalization
RJANO. 2018. № 1 (35), Pages. 85 - 109

Alexandr V. Zelenin, Dmitry V. Rudnev. The history of prepositions of conformity in Russian
RJANO. 2016. № 2 (32), Pages. 91 - 114