Maria N. Sheveleva. Once more on the Perfect and Aorist in Early East Slavic texts
RJANO. 2020. № 2 (40), Pages. 151 - 184

Maria N. Sheveleva. On the grammatical semantics of the periphrastic constructions like imatь byti vs. khočetь byti in early East Slavic texts
RJANO. 2017. № 2 (34), Pages. 194 - 218