Niewęgłowska, A., K. Borkowska, P. Osica, and A. Janas-Naze. “Evaluation of patients’ Knowledge and Awarness of Oral Cavity hygiene’s Influence on Cardiovascular Diseases”. Journal of Education, Health and Sport, vol. 7, no. 11, Nov. 2017, pp. 281-7, https://apcz.umk.pl/JEHS/article/view/5079.