Biguanide-transition metals complexes as potential drug for hyperglycemia treatment - Villamizar-Delgado, Stephanny; Porras-Osorio, Laura M.; Piñeros, Octavio; Ellena, Javier; Balcazar, Norman; Varela-Miranda, Ruben E.; D'Vries, Richard F. (RSC Advances, 2020)