Schernthaner, G.; Grimaldi, A.; Di Mario, U.; Drzewoski, J.; Kempler, P.; Kvapil, M.; Novials, A.; Rottiers, R. και άλλοι. (2004). «GUIDE study: Double-blind comparison of once-daily gliclazide MR and glimepiride in type 2 diabetic patients». European Journal of Clinical Investigation34 (8): 535–42. doi:10.1111/j.1365-2362.2004.01381.x. PMID15305887.
Schernthaner, G.; Grimaldi, A.; Di Mario, U.; Drzewoski, J.; Kempler, P.; Kvapil, M.; Novials, A.; Rottiers, R. και άλλοι. (2004). «GUIDE study: Double-blind comparison of once-daily gliclazide MR and glimepiride in type 2 diabetic patients». European Journal of Clinical Investigation34 (8): 535–42. doi:10.1111/j.1365-2362.2004.01381.x. PMID15305887.