Simultaneous estimation of six anti-diabetic drugs–glibenclamide, gliclazide, glipizide, pioglitazone, re-paglinide and rosiglitazone: development of a novel HPLC method for use in the analysis of pharmaceutical formulations and its application to human plasma assay - Venkatesh, P; Harisudhan, T; Choudhury, H; Mullangi, R; Srinivas, NR (Biomed Chromatogr., 2006)