Ciecierska-Zajdel, Beata. “Biological Determinants of the Modified Pronunciation of Polish Alveolo-Palatal Sibilants in Young Adults”. Poradnik Językowy, vol. 811, no. 2, Apr. 2024, pp. 44-59, https://www.journals.polon.uw.edu.pl/index.php/pj/article/view/1323.