1. Double blind study with neltenexine vs placebo in patients affected by acute and chronic lung diseases;Aquilina;Minerva Pneumologica,2001
2. Clinical trial of a new anti-tussive ('Dimryl');Azzopardi;British Journal of Clinical Practice,1964
3. Possibility of interaction among antibiotics and mucolytics in children;Principi;International Journal of Clinical Pharmacology Research,1986
4. Clinical effectiveness of a combination of bromhexine and amoxicillin in lower respiratory tract infection. A randomized controlled trial;Roa;Progress in Drug Research. Fortschritte der Arzneimittelforschung,1995
5. Levocloperastine in the treatment of chronic nonproductive cough: comparative efficacy versus standard antitussive agents;Aliprandi;Drugs under Experimental and Clinical Research,2004