Gorbachov, Y. “The Proto-Slavic Genitive-Locative Dual: A Reappraisal of (South-)West Slavic and Indo-European Evidence”. Journal of Slavic Linguistics, vol. 25, no. 1, June 2017, pp. 63-94, https://ojs.ung.si/index.php/JSL/article/view/386.