Lewandowski, Bogumił, Wojciech Niedziela, Sebastian de Sternberg Stojałowski, Joanna Wojnar, and Krzysztof Martiszek. 2013. “Malodor (halitosis) – Not Only a Dental Problem”. European Journal of Clinical and Experimental Medicine 11 (2):219–225. https://journals.ur.edu.pl/ejcem/article/view/12683.