Valentin Yu. Gusev. Rules of substitution PF to IPF after modal verbs with negation in Russian
RJANO. 2021. № 1 (41), Pages. 192 - 225

Valentin Yu. Gusev. Linguistic evidence for the history of Govorka (Taimyr Pidgin Russian)
RJANO. 2013. № 1 (25), Pages. 135 - 157