Sosulska, Angelika, Barbara Sambor, and Małgorzata Jekiełek. 2021. “Selected Risk Factors in Voice Disorders and Knowledge of Vocal Hygiene in Primary School Teachers. Preliminary Report”. Logopedia Silesiana 10 (1), 1-28. https://doi.org/10.31261/LOGOPEDIASILESIANA.2021.10.01.04.