title: Analytical investigations of beta-lactam antibiotics in pharmaceutical preparations - I. Spectrophotometric determination of cephalexin, cephradine, ampicillin and amoxycillin using paramolybdate anion.
authors.affiliation: Laboratory of Analytical Chemistry, Department of Inorganic and Analytical Chemistry, Faculty of Sciences, University of Ioannina, Ioannina, Greece.
authors.forename: P B
authors.initials: PB
authors.lastname: Issopoulos