1. Efficacy of amoxicillin-clavunalate in recurrent acute otitis media;Appelman;Br Med J,1991
2. Do patients with sore throat benefit from penicillin: A randomized double-blind placebo controlled clinical trial with penicillin V in general practice;Dagnelie;Br J Gen Pract,1996
3. Effects of doxycycline in patients with acute cough and purulent sputum: A double blind placebo controlled trial;Verheij;Br J Gen Pract,1994
4. Scientific communication and literature retrieval;White,1994