Greguš, Michal, Pavol Ďurč, Júlia Lačná, František Foret, and Petr Kubáň. 2018. “ Study of Various Parameters That Influence the Content of Exhaled Breath Condensate Used in the Diagnosis of Gastroesophageal Reflux Disease ”. Hungarian Journal of Industry and Chemistry 46 (1):29-33. https://doi.org/10.1515/hjic-2018-0007.