Zieliński, Grzegorz, Aleksandra Byś, Michał Baszczowski, Michał Ginszt, Marta Suwała, Jacek Szkutnik, and Piotr Majcher. 2018. “Influence of the Quality of Sleep on the Masticatory Muscle Activity - a Pilot Study”. Journal of Education, Health and Sport 8 (8):322-28. https://apcz.umk.pl/JEHS/article/view/5648.