Irina V. Begunts. Iterative verbs and their function in one North-Russian dialect
RJANO. 2017. № 1 (33), Pages. 161 - 178

Maria N. Sheveleva. Upon the history of the grammatical semantics of verbal forms like хаживал, бивал, бирал in Russian
RJANO. 2016. № 2 (32), Pages. 71 - 90

Maria N. Sheveleva. Once more on the prefixless iterative -yva-/-iva-verbs like хаживать in the history of Russian
RJANO. 2012. № 1 (23), Pages. 140 - 178