Middlebrook and Franz (). Botulinum toxins(PDF). Office of The Surgeon General, Department of the Army, United States of America. Arhivat din original(PDF) la . Accesat în .
Middlebrook and Franz (). Botulinum toxins(PDF). Office of The Surgeon General, Department of the Army, United States of America. Arhivat din original(PDF) la . Accesat în .