1. Dorow P., Weiss T., Felix R., Schmutzler H. Effect of a secretolytic and a combination of pinene, limonene and cineole on mucociliary clearance in patients with chronic obstructive pulmonary disease. Arzneimittelforschung 1987; 37: 12: 1378-1381.
2. Behrbohm H., Kaschke O., Sydow K. The influence of a secretolytic drug on mucociliary clearance of the maxillary sinus. J Rhinol 1997; 4: 1: 29-33.
3. Federspil P., Wulkow R., Zimmermann T. Effects of standardized Myrtol in therapy of acute sinusitis - results of a double-blinde, randomized multicentre study compared with placebo. Laringorhinootologie 1997; 76: 23-27.
4. Beuscher N., Kietzmann M., Bien E., Champeroux P. Interference of Myrtol standardised with inflammatory and allergic mediators. Arzneim-Forsch. Drug Res 1998; 48: 10: 985-989.
5. Hippeli S., Grassmann J., Dornisch K., Rohnert U., Elstner E.F. Freie Radikale in Pathogenese und Therapie von entzÜndlichen Erkrankungen des Bronchialsystems, In: R. Meister. EntzÜndliche Erkrankungen des Bronchialsystems. Springer 2000; 1: 1-25.