[1] Efficacy and safety of retapamulin ointment as treatment of impetigo: randomized double-blind multicentre placebo-controlled trial

[2] Impetigo. Current etiology and comparison of penicillin, erythromycin, and cephalexin therapies

[3] A controlled study of penicillin prophylaxis against streptococcal impetigo

[4] Epidemiological analysis of non-M-typeable group A Streptococcus isolates from a Thai population in northern Thailand