Zieliński, G., A. Byś, Z. Filipiak, M. Baszczowski, M. Ginszt, M. Suwała, J. Szkutnik, and P. Majcher. “Comparison of Resting Masticatory Muscle Activity Among Women of Different Ages”. Journal of Education, Health and Sport, vol. 8, no. 12, Dec. 2018, pp. 79-86, https://apcz.umk.pl/JEHS/article/view/6345.