Sosulska, Angelika, Barbara Sambor, and Małgorzata Jekiełek. “Selected Risk Factors in Voice Disorders and Knowledge of Vocal Hygiene in Primary School Teachers. Preliminary Report”. Logopedia Silesiana 10, no. 1 (June 27, 2021): 1–28. Accessed May 6, 2025. https://trrest.vot.pl/ojsus/index.php/LOGOPEDIASILESIANA/article/view/12411.