HOLGUÍN, G.; CUESTA, F.; ARCHBOLD, R.; RESTREPO, M.; PARRA, S.; PEÑA, L.; MONTOYA, B.; RÍOS, J.; TORO, V.; RUIZ, A. Bioavalaibility and pharmacokinetic comparison of two formulations of metformin 850 mg tablets in healthy Colombian volunteers. Colombia Médica, v. 42, n. 1, p. 81-87, 11 abr. 2011.