Schmiedtová, B., and N. Sahonenko. “Acquisition of L2 Written Narrative Competence: Tense-Switching by Russian L2 Speakers of German”. Journal of Slavic Linguistics, vol. 20, no. 1, May 2022, pp. 35-70, http://ojs.ung.si/index.php/JSL/article/view/210.