Zhukova N.S., Babakina T.N. «On the modal function of preterite-present verbsin Old High German» // 2011. №1 (13) C.29-41
Zhukova N.S., Babakina T.N. «Peculiarities of semantics development of the modal verb sollen in German» // Language and Culture 2018. №41 C.87-101