Dickey, S. M. (2011) “The Varying Role of po- in the Grammaticalization of Slavic Aspectual Systems: : Sequences of Events, Delimitatives, and German Language Contact”, Journal of Slavic Linguistics, 19(2), pp. 175–230. Available at: https://ojs.ung.si/index.php/JSL/article/view/229 (Accessed: 22 June 2024).